Each offspring will receive one allele from each parent, so the cross will be Yy with yy, resulting in four possible offspring: Yy, Yy, yy, and yy. Since Y is dominant to y, there will be two yellow for every four offspring or the ratio of 1/2 (Look up Punnet squares to understand this concept better)
They are this way because they have to keep oxygen in the cabins, they are at great altitudes so there’s a lack of oxygen and warm temperatures. If these systems failed the oxygen masks would drop and the cabins would drop in temperature, but it wouldn’t occur at a fast rate.
Answer:
Energy contained in the bonds of glucose is released in small bursts, and some of it can be captured in the form of adenosine triphosphate (ATP), a small molecule that is used to power reactions in the cell.
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Answer:
glycogen; lactic acid is the correct answer
Explanation:
Directional selection increases the frequency of individuals expressing one of the extreme phenotypic traits in a population. At some time in history, directional selection led to the Warbler-finches evolution.
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What is Directional Selection?</h3>
Directional selection is one of the different types of natural selection.
It increases in the proportion of individuals with an extreme phenotypic trait.
It causes a decrease in the number of individuals expressing intermediate phenotype, and the other extreme phenotype.
This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.
In the exposed example,
- All finches vary from 10 to 20 cm, but Warbler-finches is closer to 10 cm (one of the phenotypic extremes).
- All finches vary from 8 to 38 g, but Warbler-finches is closer to 8g (one of the phenotypic extremes).
So, from the whole range, Warbler-finches only express one of the extreme traits, meaning that the species has suffered from the directional selection.
These traits probably increased the animals' fitness, and hence, they were favored by natural selection.
You will learn more about directional selection at
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