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.
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
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