In squash plants, the allele for yellow fruit (Y) is dominant to the allele for green fruit (y). A plant with genotype YY is crossed with a plant with genotype Yy.

What are the expected genotype percentages in the offspring of this cross?

Question options:

A)

100% heterozygous and 0% homozygous

B)

50% homozygous dominant and 50% heterozygous

C)

50% homozygous dominant and 50% homozygous recessive

D)

25% homozygous dominant, 50% heterozygous, and 25% homozygous recessive

Question

Colin

Biology

8 October, 23:21

In squash plants, the allele for yellow fruit (Y) is dominant to the allele for green fruit (y). A plant with genotype YY is crossed with a plant with genotype Yy.

What are the expected genotype percentages in the offspring of this cross?

Question options:

A)

100% heterozygous and 0% homozygous

B)

50% homozygous dominant and 50% heterozygous

C)

50% homozygous dominant and 50% homozygous recessive

D)

25% homozygous dominant, 50% heterozygous, and 25% homozygous recessive

+3

Answers (1)

Know the Answer?

Julia Bishop · Answer 1

Y - yellow

y - green fruit

P: YY x Yy

G: Y x Y y

F1: YY, Yy

F=1

G=1:1

All offspring are a yellow

Y y

Y YY Yy

the right answer is B) 50% homozygous dominant and 50% heterozygous.