Question

In pea plants, round seeds, (R), are dominant to wrinkled, (r), and yellow seeds, (Y), are dominant to green, (y).
a. What phenotypic and genotypic ratios would be expected from the F1 cross of a wrinkled, homozygous yellow plant with a homozygous round, green plant?
b. What phenotypic and genotypic ratios would be expected from an F2 cross from the previous problem?

Answer 1

Answer:

a. all will be round and yellow with genotype RrYy

b. phenotypic:

Round-yellow: Round-green : wrinkled-yellow : wrinkled-green

9:3:3:1

genotypic:

RRYY:RRYy:RrYY: RrYy: RRyy: Rryy: rrYY: rrYy: rryy

1:2:2:4:1:2:1:1

Explanation:

4phenotypes and 9 genotypes will be there.

ratio will sum upto 16