Answer:
DNA triplet - TAC
mRNA codon - AUG
tRNA anticodon - UAC
Explanation:
A codon is found on the coding strand of double-stranded DNA which includes any three of the four bases (A, G, C, T) also called DNA triplet and in the (single-stranded) mRNA strand including any three of the four bases (A, G, C, U with U replacing T). The anticodon is found on the tRNA and also binds with the codon on the mRNA in order to attach the correct amino acid to the growing peptide chain in the ribosome.
thus for methionine
AUG is the codon on the mRNA (mRNA codon)
UAC is the tRNA anticodon
TAC is the DNA triplet that udergoes transcription to form AUG on the mRNA strand.
A rooster with white feathers is mated with a gray hen of the same phenotype. Among their offspring, 28 chicks are gray 31 are white. What is the simplest explanation for the inheritance of these colors in chickens?
Answer:
The chickens that were born from this cross show incomplete dominance.
Explanation:
The colors of chicken feathers are determined by two genes. A dominant "A" gene that determines black color and a recessive "a" gene that determines white color. In addition, chickens may present the gray color that occurs when the alleles establish an incomplete dominance, which is the type of inheritance that happens when a heterozygous individual (presents the Aa alleles) has an intermediate characteristic in relation to the characteristics determined by the two alleles .
Based on this, we can say that at the crossing shown above, there was an inheritance determined by incomplete dominance.
The inheritance of feather colors in chickens, given the mix of gray and white offspring, suggests a pattern of codominance, where the genes for white and gray feathers are neither dominant nor recessive and are expressed together in the offspring.
When a rooster with white feathers is mated with a gray hen and they produce both gray and white offspring, it appears that neither the white nor gray color is completely dominant over the other. Instead, each phenotype is expressed in the offspring, suggesting a codominant pattern where the alleles for feather color are neither dominant nor recessive and are expressed simultaneously in a unique phenotype, as is common in certain chicken breeds.Comparatively, in some other contexts, the colors may blend and display an intermediate phenotype, which is characteristic of incomplete dominance. For example, if black and white mice breed and result in all gray offspring, it would demonstrate incomplete dominance, where the black and white alleles blend to produce gray. An example in plants would be the snapdragon, where red and white parents result in pink offspring. However, in the case provided, since there are distinct gray and white offspring, codominance seems more likely.
To aid inhalation, both the diaphragm and intercostal muscles are used. By expanding the thoracic cavity, the action of these muscles creates a space with _____ atmospheric pressure.
Answer: lower atmospheric pressure
Explanation:
During the inspiration process the diaphragm, and external intercostal muscles. The contraction of the diaphragm causes the increase in the size of the thoracic cavity this causes the contraction of the external intercostal muscles. As a result of this the ribs and the sternum get elevated.
This causes the lungs to expand, and increasing the volume of the air passage. In this response the air pressure inside the lungs reduces below the air outside the body. Thus this facilitates the movement of the gases from a region of high pressure to low pressure, this way the air rushes into the lungs.
Please help !!! Explain how a change in an abiotic factor, such as sunlight, would affect biodiversity.
Answer:Loss of plant growth
Explanation:
Answer:
A change in an abiotic factor could affect the biodiversity of an eco system negatively.
Explanation:
For instance, if sunlight were dramatically decreased in a rainforest, the trees would die because they ned sunlight to produce food. this means that the monkeys, birds and other organisms wouldn't have a home and would have to leave the rainforest.
Which are true of stroke volume? Choose all correct. (20) a. It is the volume ejected per beat. b. An average resting value for stroke volume is 5 L/min. c. Cardiac output is inversely related to stroke volume. d. Mathematically, stroke volume equals EDV-ESV.
Answer:
a. It is the volume ejected per beat
d. Mathematically, stroke volume equals EDV-ESV.
Explanation:
Stroke volume refers to the volume of blood which is expelled out by the left ventricle of the heart to the body.
The stroke volume can be measured with the echocardiogram which measures the EVD or End-diastolic volume which represents the volume before the contraction of the ventricle and the ESV or End-systolic volume which represents the residual volume after the contraction.
The Stroke volume is calculated by the difference between the EDV and ESV. The stroke volume for a normal person is measured is 70 mL per sec.
Thus, the selected option is correct.