So, if we kHOW st be 6. What are the chances of an organism having two from one

Question

So, if we kHOW st be 6. What are the chances of an organism having two from one parent, and the chances p from 0.4 two p alleles? That would be the chances of of another p from the other parent, which would be p eriting a p from one parent and a q from the other is p and q, the total probability is Sinilarty, hce hances of an organism inheriting two gallolesis But since there are two ways an organism can get a So, the frequency of all the genotypes when there are two alleles, p and q, is: 1 p2 + 2pq + q2 t the genotype frequencies in a population if we know the allele re the ACTUAL genotypes trequencies to what is expected by this ?? r Wr also can compar ie equilibrium (Hardy Weinbero CeHL

Explanation / Answer

The chances of an organism having two p alleles = 1/4 because both parents have both p and q allele. Therefore the chances of getting p from one parent is 1/2 and from another parent is 1/2. Thus total probability is 1/2 X 1/2 = 1/4. Thus, p2 = 1/4.

Similarily the chances of an organism inheriting two q allele = 1/4. Thus, q2 = 1/4

The chances of an organism inheriting a p from one parent is 1/2 and q from other parent is 1/2. Therefore the chances of inheriting pq = 1/2 X 1/2 = 1/4. Thus, pq = 1/4

But, since there are two ways an organism can get a p and q, the total probability is 1/4 X 2 = 1/2. Thus, 2pq = 1/2

So the frequency of all the genotypes when there are two alleles p and q is:

p2 + 2pq + q2 = 1. (Here value of p2 = 1/4, 2pq = 1/2 and q2 = 1/4). Therefore

1/4 + 1/2 + 1/4 = 1

or 0.25 + 0.5 + 0.25 = 1

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