Question

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 be expected in the phenotypes of their offspring?

Responses

2 with red stripes: 2 with yellow stripes

2 with red stripes: 2 with yellow stripes

all with yellow and red stripes

all with yellow and red stripes

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

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

all with red stripes

Answer 1

Genotypes: RR (red) × YY (yellow). Gametes: R × Y → all offspring RY.

Phenotype: RY = red and yellow stripes, so 100% of the offspring show both colors (all with red and yellow stripes).