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2 years ago

AP Biology - If 72 out of 200 individuals....(pic is attached) - worth 25 points!

Biology

1 answer:

Whitepunk [10]2 years ago

5 0

Answer:

A.) 48%

Explanation:

AA = dominant genotype

Aa = heterozygous genotype

aa = recessive genotype

Hardy-Weinberg Equations:

p² + 2pq + q² = 1 p + q = 1

In this equation, In this equation,

-----> p² = frequency of "AA" -----> p = frequency of "A"

-----> 2pq = frequency of "Aa" -----> q = frequency of "a"

-----> q² = frequency of "aa"

(Step 1)

Determine the frequency of the recessive allele ("a").

72 / 200 = 0.36 recessive phenotype

The only way to have the recessive phenotype is to have the recessive genotype, aa. Therefore, q² = 0.36.

If q² = 0.36, then q = 0.6 (take the square root).

(Step 2)

Determine the frequency of the dominant allele ("A").

p + q = 1

p + 0.6 = 1

p = 0.4

(Step 3)

Determine the frequency of the heterozygous genotype ("Aa").

If -----> p = 0.4 and q = 0.6

Then -------> 2pq = 2(0.4)(0.6) = 0.48

0.48 x 100% = 48% Aa

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