Answer:
B. Evolution
Explanation:
The change in allele frequencies from mostly light wings to dark wings has been commonly studied in evolution. It's a great example of natural selection favoring the more fit phenotype, in this case the dark that can blend in better with darker trees and darker, smoggy environment.
- Why not competition: This doesn't have to do with limited resources.
- Why not acquired: Lamarck's theory of acquired traits is defunct!! Don't fall for it!!
- Why not overpopulation: This was not hinted at in the question.
D, I believe
Meiosis produces gametes, each parent provides a gamete, containing half the number of require chromosomes. These combine to create a full set of chromosomes.
Thus be a SILENT mutation;
would be a NONSENSE mutation.
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Answer:
Parents: yellow, entire petals (CC FF) × white, fringed petals (cc ff) F1 (Cc Ff)
For the cross of a heterozygous F1 individual (Cc Ff) with a homozygous recessive
individual (cc ff) we would expect a phenotypic ratio of 1:1:1:1 for the different phenotypic classes.
Phenotype Observed (O) Expected (E) (O - E)2/ E or ( 2)
Yellow, entire 54 43.75 2.40
Yellow, fringed 58 43.75 4.64
White, entire 53 43.75 1.96
White, fringed 10 43.75 26.0
Total 175 175 35
Degrees of freedom = 4 - 1 = 3. The chi-square value is greater than 12.838 for a probability value less than .005, or 0.5% that random chance produced the observed ratio of California poppies.
B .t is unlikely that random variations produced the observed ratio.
Explanation:
Hope this help!!
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Answer:
Natural selection has been studied since Charles Darwing first started his research.
Explanation:
<em>Basically natural selection changes the frequency of traits. Left themselves in large , freely interbreeding populations, the frequency of traits will remain the same from generation to generation. The traits are often heritable, in living organisms, many characteristics are inherited, or passed from parent to offspring. </em>
<em>The reasons why we mightt not see a response to directional selection on such a trait are:</em>
- <em>More offspring are produced than can survive.</em>
- <em> Organisms are capable of producing more offspring than their environments can support. </em>
- <em>Offspring vary in their heritable traits. </em>