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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

Respuesta :

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.

mahima6824soni

The expected genotype percentages in the offspring when YY is crossed with a plant with genotype Yy is 50% homozygous dominant and 50% heterozygous. The correct option is B.

What is the dominant and recessive allele?

Alleles are a variant of genes. They are of two types, dominant, the one which shows up, and the recessive, the one which is hidden. Dominant is represented with a capital letter and the recessive is represented with a small letter.

When the YY  x Yy

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

Thus, option B) 50% homozygous dominant and 50% heterozygous

is correct.

Learn more about dominant and recessive allele, here:

https://brainly.com/question/1959385

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