Adaptive genes are selected and passed from generation to generation.
<h3>Natural selection and the evolution of long necks in giraffes</h3>
According to Darwin's theory of natural selection, natural selection selects for adaptive genes in organisms and deselects non-adaptive genes.
Thus, adaptive genes are passed from generation to generation.
In the case of the giraffes. It is plausible that their ancestors kept on stretching their necks in order to feed as the trees they fed on kept growing taller. The taller the tree grows, the longer the ancestors of giraffes stretched their necks to reach it. Otherwise, they just might have to die of starvation.
This adaptation activated the long-neck genes in the ancestors of giraffes. Natural selection selects this trait and it was passed down across generations.
More on natural selection can be found here: brainly.com/question/9830102
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<u>Answer:</u>
<em>Trochlear notch is the primary region of the ulna that forms the hinge joint with the humerus. Trochlear notch is the upper cavity part of ulna that has the purpose of fitting the trochlear part of the humerus</em><em>.</em>
It is the hinge joint in the elbow region that makes the hand flexible to rotate. The <em>notch is a semicircular hollow cavity structure in the human arm to fit </em>in the humerus bone which is the bone above ulna in human arm.
I am pretty sure the correct answer is A. Wind factor is the only non-living part from the choices.
Could be the sun but that's just me
84%
84% of the population of mice would be heterozygous.
<h3>What does heterozygous mean?</h3>
Heterozygous refers to the presence of two different allele types for the same gene. For a single gene, these alleles display two distinct character types. An illustration would be someone with an allele for both brown and black hair.
There are 200 mice in total, 168 of which are brown.
By the Hardy–Weinberg (HW) equilibrium
q² (bb) = (200 - 168) /200 = 32 / 200 = 0.16
q: √ 0.16 = 0.4
p = 1 - q = 1 - 0.4 = 0.6
p² (BB) = 0.6 x 0.6 = 0.36
Thus, 84% of the population of mice would be heterozygous.
<h3>What is meant by population heterozygosity?</h3>
- Given that q2 is significantly smaller than 2pq when q is close to zero and p2 is significantly smaller than 2pq when p is close to zero, rare alleles are mostly found in heterozygotes.
- This is known as population heterozygosity.
To learn more about heterozygous population visit:
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