Question

In peas, yellow pea pods (Y) are dominant to green pea (y) pods. If a heterozygous
dominant male is crossed with a heterozygous dominant female, what is the probability
that the offspring will be green?

Answer 1

Answer:

In crossing heterozygous pea plants for the color of the pea pods trait, the probability of a offspring with the green pea pod is 25%.

Explanation:

Taking into account that the dominant trait is the yellow pea pod, and that both members of the parental generation are heterozygous (Yy):

Parental generation:

♂ Yy

♀ Yy

Making a Punnet's Square for this crossing:

Yy x Yy

Alleles    Y      y

Y            YY   Yy

y             Yy   yy

In the offspring, the phenotypic probabilities are :

• Plants with yellow pea pods (Yy) 50%.
• Plants with the yellow pea pod (YY) 25% .
• Plants with green pea pods (yy) 25%.

The Yy:YY:yy ratio is 2:1:1