What is the probability of getting a pea plant with recessive green seed color when two heterozygous pea plants,both having the dominant yellow-seeded phenotype,are crossed with each other?
A)1 in 6
B)1 in 4
C)1 in 2
D)None

Question

Quizplus · Accepted Answer

When two heterozygous pea plants are crossed, the genotype of the parents is Yy x Yy (where Y denotes allele for yellow seed color and y denotes allele for green seed color). The Punnett square for this cross would be:

|  Y  |  y  |
| --- | --- |
| Y  | YY | Yy |
| Y  | Yy | yy |

The offspring of this cross would be:
- YY (yellow seed color) = 1/4
- Yy (yellow seed color) = 1/2
- yy (green seed color) = 1/4

Therefore, the probability of getting a pea plant with recessive green seed color (yy) is 1/4 or 25%, which can be simplified to 1 in 4. Hence, the best choice is B.

What Is the Probability of Getting a Pea Plant with Recessive