Question

R is the allele for round seeds while r is the allele for wrinkled seeds. Y is the allele for yellow seeds and y is the allele for green seeds.In a cross of parents heterozygous for each trait (RrYy x RrYy), what fraction of the offspring are expected to have round green seeds?A) 1/16B) 9/16C) 3/16D) 1/4

Answer 1

We have two parents with RrYy genotype.

We can see the cross with a Punnett square, and look for the seeds with genotype RRyy or Rryy, which will produce round green seeds.

As we can see, 3/16 of the seeds will be round and green, which means C) 3/16 would be the right answer.