the allele for green skin color in frogs is 3 and the allele

the allele for green skin color (in frogs) is .3 and the allele for yellow color is .7. What would the probabilities, phenotypes and genotypes of all offspring from two heterozygotes?

Solution

The allele for green skin color (in frogs) is .3= p

the allele for yellow color is .7=q

We apply Hardy-Weinberg equilibrium,

2pq = the fraction of heterozygotes

(p+q)² = p² + 2pq + q²

2pq = 2X.3X.7=.42

42% of the population are heterozygotes.