Consider a population that contains black and white cats where the black allele

Question

Consider a population that contains black and white cats where the black allele (B) is dominant and the white allele (b) is recessive. Indicate whether each statement is true or false.

1. Evolution is occurring in a population of cats where the genotype frequencies of BB, Bb, and bb are 0.64, 0.32, and 0.04, respectively.  TrueFalse
2. A population of cats is in Hardy-Weinberg equilibrium when the genotype frequencies of BB, Bb, bb are 0.49, 0.33, and 0.16, respectively.  TrueFalse
3. Evolution is occurring in a population of cats where the genotype frequencies of BB and Bb are 0.7 and 0.2, respectively.  TrueFalse
4. A population of cats is in Hardy-Weinberg equilibrium when the genotype frequencies of BB and Bb are 0.25 and 0.5, respectively TrueFalse

Explanation / Answer

Answer:

1). Flase

Hardy-Weinberg equilibrium= p^2 + 2pq+q^2=1

0.64+0.32+0.04=1 (not deviation from Hardy-Weinberg equilibrium)

2). False

Hardy-Weinberg equilibrium= p^2 + 2pq+q^2=1

0.49+0.33+0.16= 0.98 (deviation from Hardy-Weinberg equilibrium)

3). True

BB= 0.7

B = p=0.84

b= q= 0.16

bb= 0.03

Bb = 2pq= 2* 0.84 * 0.16= 0.27 (expected)

Hardy-Weinberg equilibrium= p^2 + 2pq+q^2=1

0.7+0.2 + 0.03= 0.93 (Deviation from Hardy-Weinberg equilibrium)

4). True

BB = 0.25

B= p=0.5

b=q=0.5

bb = 0.25

Bb = 2pq= 2 *0.5 * 0.5 = 0.5(expected)

Hardy-Weinberg equilibrium= p^2 + 2pq+q^2=1

0.25 + 0.5 + 0.25=1

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