Answer:2/3
Explanation:
this is the ancwer i got
Final answer:
The proportion of F2 progeny with the allele for wrinkled skin is expected to be 1/4 when considering a dihybrid cross of two heterozygous pea plants. This is based on the principles of Mendelian genetics and the monohybrid 3:1 ratio characteristic of a single trait with one dominant and one recessive allele.
Explanation:
When considering a dihybrid cross and determining the proportion of progeny that carries an allele for a specific trait such as wrinkled skin in peas, we utilize the principles of Mendelian genetics, particularly the concept of independent assortment and dominance.
For the trait of seed texture, the allele for wrinkled skin in peas is recessive, typically represented as 'r'. In a dihybrid cross of two heterozygous F1 plants (RrYy), we expect to see a phenotypic ratio of 9:3:3:1, which can be broken down into two separate monohybrid 3:1 ratios, one for each trait. Thus, considering only the texture, three-quarters of the F2 offspring will display the dominant round phenotype (R_), and one-quarter will display the recessive wrinkled phenotype (rr). This is because the proportion of F2 progeny with wrinkled skin (homozygous recessive condition rr) is expected to be 1/4, as determined by the product of the probabilities for each independent event: (1/4) × (1/4).
A scientific theory can be defined as a well-supported and widely accepted explanation of nature. According to this definition, which statement describes a scientific theory.
A) The Earth is older than 100,000 years.
B) Matter cannot be created or destroyed.
C) For every action, there is an equal and opposite reaction.
D) Natural selection is one of the mechanisms by which evolution occurs.
PLEASE HELP! I AM MARKING BRAINLIEST!
Answer:
I specifically think A is the answer ur looking for. I mean take real smarts to know that right ?
Based on the information of the graph , which regions population will change the least in the next 40 years?
A -Oceania
B -africa
C-United states
D-Europe
Answer:
D. Europe
Explanation:
What is the name of the “thing” that has antigens on its surface? Where are antigens found on these “things”?
Answer:
On the surface of red blood cells
Explanation:
Antigens are found on the surface of the red blood cells and are ignored by the immune system but antigens of another blood type are seen as foreign and attacked by antibodies
The following is a strand of DNA:
C-T-A-G-C-T-A-T-A-C-G-A-C-T
list the complementary DNA strand that would be made from this strand in DNA replication
Answer:
G-A-T-C-G-A-T-A-T-G-C-T-G-A
Explanation:
This is the complementary DNA strand that would be made. C links with G, G links with C, A links to T, and T links to A. Hope this helped :)
The complementary DNA strand for the given sequence 3'-T A C T G A C T G A C G A T C-5' is 5'-A G T G A C T G A C G T A G-3', following the base-pairing rules of A with T and G with C.
The original DNA strand given is 3'-T A C T G A C T G A C G A T C-5'. To create a complementary DNA strand during DNA replication, we need to add nucleotides that are complementary to each one on the original strand.
Here are the base pairing rules to know:
Adenine (A) pairs with Thymine (T)Thymine (T) pairs with Adenine (A)Cytosine (C) pairs with Guanine (G)Guanine (G) pairs with Cytosine (C)Using these rules, the complementary DNA strand to the given sequence, going in the 5' to 3' direction, would be 5'-A G T G A C T G A C G T A G-3'. Each original nucleotide has been paired with its corresponding partner.
why do ecosystems require continuous input of energy from the sun, and what is the process that converts the suns energy to chimical energy
Answer:
Ecosystems require continuous input of the sun's energy, to support the plant life, which feeds the herbivores of that community, and so on throughout the trophic levels. The process that converts the sun's energy to chemical energy is known as photosynthesis.
Explanation:
hope this helps!
Hungaaroons can have straight hair, wavy hair, or curly hair. Straight hair is caused by having two of the same allele (SS). Curly hair is the results
of having two curly hair alleles (CC), Wavy haired individuals are heterozygous. What type of inheritance pattern does this trait follow?
Answer:
Wavy haired would be SC, seeing as it is "heterozygous," meaning it has one of each allele. This is called incomplete dominance, where neither allele is expressed fully over the other.
2. If 28% of the bases in a DNA strand are guanine, what percentage are thymine?
3. DNA replication is semi-conservative. What does this mean?
4. Match the DNA replication enzyme with Its correct function:
1.__ Helicase
2.__ primase
3.__ DNA polymerase
a. Adds new DNA nucleotides
B. Unwinds the DNA strand
C. Add an RNA primer to signal where replication should begin
Answer:
2) According to Erwin Chargaff's rule:
* Purine adenine is equimolar with pyrimidine thymine
* Purine guanine is equimolar with pyrimidine cytosine
i.e. A = T & G = C
So, If G = 28% then C = 28%
Total bases = 100%
A + T + G + C = 100%
2T + 2G = 100%
2T + 56% = 100%
2T = 100% - 56%
2T = 44%
T = 22%
Percentage of thymine = 22%
3) Watson and Crick proposed a scheme for DNA replication that suggest that the two stands of DNA would separate and act as template for the synthesis of complementary strands. After the completion of replication, each DNA molecule would have one parental and one newly synthesized strand. This scheme was termed as semi-conservative DNA replication.
4) 1. Helicase - B. Unwinds the DNA strand
2. Primase - C. Add an RNA primer to signal where replication should begin
3. DNA polymerase - A. Adds new DNA nucleotides
why do sperm cells need energy?
Sperm cells need energy primarily to move towards and fertilize the egg. This energy is provided by ATP, produced by mitochondria densely packed in the sperm's midpiece. Sperm's functionality and survival depend on this energy, especially during the journey within the female reproductive tract.
Explanation:Sperm cells require energy for several reasons. As highly specialized cells, they are designed to travel a significant distance to reach and fertilize an egg. The midpiece of a sperm is densely packed with mitochondria, organelles known as the powerhouses of the cell, which produce adenosine triphosphate (ATP) — the energy currency of the cell. This energy is crucial for the motion of the sperm’s tail, a long flagellum, allowing it to propel itself forward effectively.
Considering that sperms are minuscule, and so many are produced daily, the speed at which they must move to reach the oocyte is comparable to a human walking briskly. This is a remarkable feat and demands vast amounts of ATP. Additionally, during capacitation, fluids in the female reproductive tract further prepare the sperm for fertilization, which also requires energy.
A cross between two pure parents for contrasting traits, e.g. tall and short , result in offspring trait are referred to as: (a) medium (b) short (c) hybrids (d) pure for both traits
Answer:
A. Medium
Explanation:
The offspring would get a mix of both of the traits.
WILL AWARD BRAINLIEST!!! Mendelian Genetics
Question 3
Homozygous describes -
a. two of the same alleles that express a trait.
b. the passing of traits from parent to offspring.
c. two different alleles that express a trait.
d. an allele that is hidden by another.
Question 4
A _____________________________ allele is hidden by the presence of another allele that is represented by a lowercase letter.
a. Dominant
b. Heterozygous
c. Phenotype
d. Recessive
Question 5
An organisms set of genes that are representd by letters is -
a. Phenotype
b. Heterozygous
c. Genotype
d. Alleles
Question 6
An allele is -
a. expressed while it hides another.
b. two of the same in order to express a trait.
c. a diagram that predict genetic outcomes.
d. different gene choices for a trait.
Question 7
This allele tends to hide the presence of another allele, is expressed most often and is represented by a capital letter.
a. Recessive allele
b. Dominant allele
c. Heterozygous allele
d. Genotypic allele
Question 8
The characteristics that are physically expressed is/are known as it's -
a. Homozygous
b. Gene
c. Allele
d. Phenotype
Answer:
Question 3. C
Question 4. D
Question 5. C
Question 6. D
Question 7. B
Question 8. D
I didn't do this test, but I'm really good with genetics, so I hope this helps! good luck!!
Mendel's genetics has the laws that help to determine the characters of various chromosomes expression and the expression mechanisms. The same genes present on the allele is called as homozygous and the different ones are called as heterozygous.
What is the dominant allele ?
It is the set of genetic expressions which express themselves in the genotype or phenotype of the individual.
Homozygous describes two of the same alleles that express a trait. That means the same of alleles that are controlling a single and same expression. The another one in which a different set of chromosomes are present are called as heterozygous.
Recessive allele is hidden by the presence of another allele that is represented by a lowercase letter where the capital letter is called as a dominant trait expressing gene.
An organisms set of genes that are represented by letters is called as genotype. It is controlling the genetic expression of an individual.
An allele is -expressed while it hides another. It is the expression where one of the allele is getting expressed and the another one is not terming them as dominant and recessive.
This allele tends to hide the presence of another allele, is expressed most often and is represented by a capital letter. It is the dominant gene.
The characteristics that are physically called as phenotype that control the physical features along with the physical expressions of an individual.
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With increased altitude how does the density of the atmosphere change?
remains the same
fluctuates
increases
decreases
Answer:
increases
Explanation:
How are organisms in the domain Eukarya different from those in the domain
Archaea?
O A. Eukaryotes have one cell.
B. Eukaryotes have a cell wall.
O C. Eukaryotes have DNA.
D. Eukaryotes have organelles in membranes.
organisms in the domain Eukarya different from those in the domain Archaea are - D. Eukaryotes have organelles in membranes.
The Eukarya differ from the Archea and Bacteria. The eukarya domain has eukaryotic cells whereas the Archaea domain has prokaryotic cells.
Eukarya consist up of a "membrane-enclosed nucleus" and "other membrane-enclosed organelles".Cell wall present in all Archaea and some of the eukarya.DNA is the genetic material in all domains.Eukarya organisms can be unicellular or multicellularThus, organisms in the domain Eukarya are different from those in the domain Archaea are - D. Eukaryotes have organelles in membranes.
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Eukaryotes, found in the domain Eukarya, have a nucleus and other membrane-bound organelles whereas organisms in the domain Archaea do not. Archaea instead are prokaryotes with no nucleus or membrane-bound organelles.
Explanation:Organisms in the domain Eukarya are different from those in the domain Archaea in several ways, most notably in their cellular structure. The key distinguishing factor is that Eukaryotic cells, found in Eukarya, have a nucleus that contains their DNA and have other distinct membrane-bound organelles such as mitochondria and Golgi bodies. This is option D: Eukaryotes have organelles in membranes.
In contrast, organisms in the domain Archaea don't have these features. They are prokaryotes, meaning their cells do not contain a nucleus or other membrane-bound organelles. Their DNA is found in the cytoplasm rather than a membrane-bound nucleus.
It is also important to note that while some eukaryotes do have cell walls (like plants and fungi), not all eukaryotes do (animals, for instance). By contrast, all archaea have a cell wall, but it's made up of different material than the cell walls in Eukarya.
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What would be the complementary strand for the following template?
CTAGGAAGTTC
OCTAGGAAGTTC
O GATCCTTCAAG
O TCGAAGGCCT
O AGCTTCCTGGA
Answer:
GATCCTTCAAG
I believe
Which of the following causes the most problems in countries with low economic growth?
poor education
low unemployment
higher standard of living
rapid population increas
Answer:
The 4th one (D) Rapid Population Increases
Explanation:
on edge 2020
What causes the change from day to night and vice versa?
OA.
The orbit of Earth around the sun.
OB.
The rotation of Earth on its axis.
OC. The orbit of the sun around Earth.
OD. The moon's rotation around Earth.
Answer:
its right
Explanation:
STUDY ISLAND
Which kingdoms include unicellular organisms?
Answer:
Older system divides eukaryotic organisms into Animalia, Plantae, Fungi, Chromista and Protista. All of these 5 kingdoms contain unicellular species, except for Animalia. Note: Eukarya, Bacteria and Archea are not "kingdoms" as some people wrote. They are "domains" of life or "superkingdoms"!
i hope this helps :)
Explanation:
The kingdoms that include unicellular organisms are Protista, Archaea, and Bacteria. While Protista consists of both unicellular and multicellular organisms, the Archaea and Bacteria kingdoms are strictly unicellular.
Explanation:The kingdoms that include unicellular organisms are Protista, Archaea, and Bacteria. Organisms in the Protista kingdom can be unicellular or multicellular, but many are unicellular like amoebas and paramecia.
On the other hand, all organisms in the Archaea and Bacteria kingdoms are unicellular and represent some of the earliest forms of life on Earth.
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Practice 1: What is so important about DNA? Select all correct answers.
A. DNA is found in all organisms and carries instructions to build those organisms
B. DNA found in one organism probably shares similar instructions found in another species
C. DNA is composed of only four bases that repeat in a sequence that is different for each species
D. Some organisms don’t actually have DNA
E. The DNA of each organism is made out of different types of chemical
Answer: A B C
Explanation: I did this and got it correct!
Why is the Huronian Supergroup rock formation particularly interesting to scientists?
A .because it looks like a cross-section of a giant, stone encyclopedia
B .because it formed during the period when oxygen began to accumulate in the atmosphere
C .because it contains unusually large amounts of oxygen and sulfur
D .because it formed during the period when oxygen began to accumulate in the atmosphere
Answer:
B and D are the same answer..
It's B and D I suppose either one works
Explanation:
B. Because it formed during the period when oxygen began to accumulate in the atmosphere.
What is Huronian Supergroup rock formation?The Huronian Supergroup is a rock formation that formed about 2.4 billion years ago, during the Huronian Era of Earth's history. This period is particularly interesting to scientists because it marks the time when oxygen began to accumulate in the Earth's atmosphere.
Prior to this, the Earth's atmosphere was mostly composed of methane, ammonia, and other gases, and the development of oxygen in the atmosphere represented a major turning point in the evolution of life on Earth. As a result, the Huronian Supergroup and other rock formations from this period are of great interest to scientists studying the early history of the Earth and the development of life on our planet.
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As countries develop, do they have more or less of an impact on the planet?
Answer:
More impact on he planet.
Explanation:
The reason why is because there will be more population and cutting down of trees and pollution
The behaviorist B.F skinner was a __ when it came to explaining how children learn language
Answer: nurturist
Explanation:
The American psychologist and behaviorist Burroughs Frederick Skinner ( 1904 – 1990) was a Harvard Professor of Psychology. He is considered the pioneer of modern behaviorism. He explained in his book “Behavior of Organisms “ how environmental variables control behavior. He believed that parents’ nurturing shape the child’s language behavior.
Final answer:
B.F. Skinner, a behaviorist, believed children learn language through reinforcement and feedback, but his view was challenged by Noam Chomsky who proposed an innate capacity for language. Today, language acquisition is understood as an interplay of nature and nurture, combining Skinner's behavioral perspective with innate elements suggested by Chomsky.
Explanation:
The behaviorist B.F. Skinner was a proponent of the idea that children learn language through the process of reinforcement and feedback. This perspective posits that behavioral responses, including language, are shaped by environmental stimuli and consequences, such as rewards or punishments. For example, when a child uses a word like cookie, they are met with reinforcement if they receive a cookie or punishment if they are denied. Skinner saw no fundamental difference between verbal behavior, like asking for a cookie, and non-verbal actions, like reaching for one. Skinner's analysis of language suggests that all complex verbal behavior develops from simple beginnings and is then shaped into its more abstract forms, in the same way as any other behavior.
However, Skinner's view on language acquisition was challenged by the linguist Noam Chomsky, who introduced the idea of an innate language acquisition device (LAD) that humans are born with, suggesting that there is an inherent capacity for language learning. Current researchers generally believe that language learning is a combination of innate abilities and environmental influences, a view that combines elements from both Skinner and Chomsky's theories. Consequently, while Skinner's approaches were influential, they are now seen as part of a larger framework that includes biological and cognitive factors.
Help!!!! ASAP!!! Please!!
If we grow more green plants to we can get more solar energy, will no energy from the sun will be wasted???
Answer:
The suns energy will not be wasted because the suns energy is a resource that is infinite to us.
A body of air in the atmosphere that has mostly constant temperature, humidity, and pressure is…
A. Cold Front
B. Weather
C. Atmosphere
D. Warm front
E. Air Mass
Answer:
E. Air Mass
Explanation:
The definition of an air mass is "a body of air with horizontally uniform temperature, humidity, and pressure."
Answer:
E. Air Mass
Explanation:
Urgent!!!
Where is the majority of Earth's water found?
glaciers
oceans
ground
rivers and lakes
Answer:
Oceans would be your answer
Explanation:
That is where the majority of water found on Earth is
Answer:
Oceans
Explanation:
The ocean holds about 97 percent of the Earth's water; the remaining three percent is found in glaciers and ice, below the ground, in rivers and lakes.
is carbon atoms move between the atmosphere and organisms connecting earths biosphere and atmosphere true or false
Which element is more metallic: cesium (Cs) or barium (Ba)?|
Answer:
Cesium
Explanation:
Answer:
Cesium (Cs) is more metallic.
Explanation:
Please give me brainliest.
What is the main cause of an earthquake?
O force of gravity
O the shaking of the ground
stress caused by plate movement
waves that ripple from the epicenter
Answer:
stress caused by plate movement
Stress caused by plate movement is the main cause of an earthquake. So, the correct option is C.
What is an earthquake?A abrupt discharge of energy in the Earth's earth's crust that results in seismic waves causes an earthquake, which is the shaking of the planet's surface.
Sudden movement along Earth's fault lines causes earthquakes. The motion releases "elastic strain" energy that has been accumulated in the form of seismic waves, which travel through the Earth and cause the earth to tremble.
The primary cause of an earthquake is stress brought on by plate movement. Buildings, dams, etc. can sustain significant damage as a result of earthquakes. They might also bring about tsunamis, land slides, floods, and fatalities. A disturbance deep within the earth's crust is the reason behind it.
Therefore, the correct option is C.
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You just read an article on the Endosymbiotic Theory. Based on what you read, what is the importance of the Endosymbiotic Theory? its asking for a paragraph pls help!!
Answer:
The endosymbiotic theory which is also sometimes referred to as symbiogenesis states that all the organelles of the eukaryotic cells are prokaryotic cells that tends to live in a much larger host. This theory is important because it does explains how the eukaryotic cells are able to obtain the needed nourishment that is believed to be replenished by the prokaryotic cells.
Explanation:
The endosymbiotic theory provides the foundational bases of the cellular biology field and it enables to understand the evolution of eukaryotic cells.
In a similar manner to the evolutionary theory, endosymbiotic biology is fundamental to understand the evolution of eukaryotic cells.The endosymbiotic theory states that eukaryotic cells evolved by a symbiotic (positive) relationship among a primitive eukaryotic cell and prokaryotic cells. Mitochondria and chloroplasts are organelles that evolved from this cooperation.This theory allows us to understand several features of mitochondria and chloroplasts:Both chloroplasts and mitochondria have their own genetic material (DNA).Chloroplasts and mitochondria have bacterial-like ribosomes, which are responsible for protein synthesis.
In conclusion, the endosymbiotic theory provides the foundational bases of the cellular biology field and it enables to understand the evolution of eukaryotic cells.
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If individual III-3 married a woman who was heterozygous for dimples, what is the percent chance their children will have dimples?
A.) 0%
B.) 25%
C.) 75%
D.) 100%
Answer:
B 25 percent
Explanation:
right answer on edge 2021
Answer:c its c trust me
Explanation:
Which feature do prokaryotic and eukaryotic cells share?
A) nucleous
B) cytoplasm
C) Nuclear Membrane
D) Membrane-bound organelles
Explanation:
B) Cytoplasm
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The rock particles that make up soil come from parent bedrock. Weathering breaks bedrock into smaller and smaller pieces. The characteristics of any soil depend mostly on the type of parent bedrock. Just like you have characteristics that are like your parents, soils have characteristics that are like those of the parent bedrock. Take a look at the soil textural triangle. Soil particles are classified by size; sand particles are the largest and clay particles are the smallest. Most soils are some mixture of these three particles.
Imagine that a soil is 85% composed of weathered sandstone. Over time, a river flowing over the bedrock deposits sand and a very small amount of clay. By using the soil textural triangle, scientists have decided that the soil is mostly likely
A) silt loam.
B) clay loam.
C) loamy sand.
D) sandy silt loam.
The soil in question is option C - loamy sand.
Loamy sand is a soil composition dominated by sand particles, with a small amount of clay particles. According to the soil textural triangle, loamy sand is a soil composition mostly consisting of sand particles (the largest particles) and a smaller amount of clay particles (the smallest particles). The 85% composition of weathered sandstone indicates a high concentration of sand, making loamy sand the most appropriate classification.
The soil textural triangle classifies soils based on their composition of sand, silt, and clay. Each corner of the triangle represents 100% composition of one of these particles: sand, silt, or clay.
Given that the soil is 85% composed of weathered sandstone,
It means that the dominant particle size in the soil is sand. Locate the point on the triangle where the sand percentage is approximately 85%. This point falls within the loamy sand region.The soil's composition aligns with the characteristics of loamy sand, which is a mixture of sand and a small amount of silt or clay. Therefore, the soil is mostly likely loamy sand.