A certain species of grasshopper can have red stripes, yellow stripes, or red and yellow stripes. An RR grasshopper has red stripes, a YY grasshopper has yellow stripes, and an RY grasshopper has red and yellow stripes.

Question

A grasshopper with red stripes mates with a grasshopper with yellow stripes. What ratio would you expect to see in the phenotypes of their offspring? (B.6F)

Question 7 options:

all with yellow and red stripes

all with red stripes

2 with red stripes: 2 with yellow stripes

1 with red stripes: 2 with red and yellow stripes: 1 with yellow stripes

Answer 1

The phenotypes of the offspring will depend on the genotype of the parents.

If the red-striped grasshopper (RR) mates with the yellow-striped grasshopper (YY), the possible genotypes for their offspring are:

RR - red-striped
RY - red and yellow-striped
RY - red and yellow-striped
YY - yellow-striped

Therefore, the ratio of phenotypes in the offspring would be:

1 red-striped : 2 red and yellow-striped : 1 yellow-striped