Question

Imagine that you are performing a cross involving seed color in garden pea plants. What traits would you expect to observe in the F1 offspring if you cross true-breeding parents with green seeds and yellow seeds?

(A) Yellow seed color is dominant over green.
(B) only yellow-green seeds
(C) green seeds:yellow seeds 1:3
(D) yellow seeds:green 1 : 1
(E) only yellow seeds

Answer 1

Option E, only yellow seeds

Step-by-step explanation:

True breeding means when the genotype of one parent consists of two identical alleles.

Let allele for green color seed be represented by "g" and yellow color seed be represented by "G"

In this scenario,

Genotype of true-breeding parents with green seeds is "gg"

Genotype of true-breeding parents with yellow seeds is "GG"

It is given that Yellow seed color is dominant over green

The punnet square representing this cross would be

G G

g Gg Gg

g Gg Gg

All the offspring are heterogyzous yellow seeded plants

Thus, option E is correct