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Agene has two al eles ëAí and ëaí with a frequency of p and q respectively the genotypic frequencies would have the proportion : (A) (p + q) 2 =1 (b) p 2 -q 2 -1 (c) pq = ½ (d) (p – q) 2 =1

Agene has two al eles ëAí and ëaí with a frequency of p and q respectively the genotypic frequencies would
have the proportion :
(A) (p + q)2=1
(b) p2-q2-1
(c)  pq = ½
(d) (p – q)2=1
 

 

Grade:12

1 Answers

Raheema Javed
156 Points
6 years ago
The correct answer is (A) (p+q)2=1.

In the simplest case of a single locus with two alleles denoted A and a with frequencies f(A) = p and f(a) = q, respectively, the expected genotype frequencies are f(AA) = p2 for the AA homozygotes, f(aa) = q2 for the aa homozygotes, and f(Aa) = 2pq for the heterozygotes. The genotype proportions p2, 2pq, and q2 are called the Hardy-Weinberg proportions. Note that the sum of all genotype frequencies of this case is the binomial expansion of the square of the sum of p and q, and such a sum, as it represents the total of all possibilities, must be equal to 1.

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