Yellow squash Y is dominant over white squash y. A cross between YY and yy occurs. What are the genotypic percentages?

The genotype percentage is 100 % of Yy genotype as all the individuals from this cross are of genotype Yy.

Explanation:

Data given:

Yellow squash  Y = dominant

white squash y = recessive

cross between YY X yy

genotype  percentage =?

the cross between two squash colors will be seen in the Punnet square.

  YY   X yy

    y     y

Y  Yy  Yy

Y  Yy   Yy

Genotype percentage will be on the assumption that each box of the punnet square represents 25 %. We can see that all the individuals formed from the cross of homozygous dominant and homozygous recessive will yield heterozygous individuals with dominant phenotype.

the genotype percent is 100% of Yy genotype.