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:
[tex]2 \div 4 = .5 \times 100 = 50[/tex]
There is a 50% chance of the offspring having wrinkled seeds.
