Question

A pea plant with round seeds (Rr) is crossbred with another pea plant with wrinkled seeds (rr). What is the probability of offspring having wrinkled seeds?

0%
25%
50%
75%

Answer 1

There is a 50% chance of the offspring having wrinkled seeds.

Step-by-step explanation:

Answer 2

The offspring must have one gene from each parent. To find the possible genes for all offspring, list all possible combinations that have a gene from each parent:

(Rr) | (rr)

R | r
R | r

r | r
r | r

The question asks for the probability of the offspring having rr genes. There are 2 offspring that have these genes out of the 4 created. Divide 2 by 4, then multiply by 100:


`2 / 4 = .5 * 100 = 50`

There is a 50% chance of the offspring having wrinkled seeds.