Question

PLEASEE HELPP!!

What would be the phenotypic percentages and genotypic percentages of a cross between two parents where one is homozygous recessive and one is homozygous recessive and one is heterozygous dominant for a particular trait? Draw a Punnett Square to show your work.

Answer 1

Step-by-step explanation:

• homozygous recessive= eg. gg
• heterozygous dominant= eg. Gg

looking at the diagram

• percentage of getting a child that is heterozygous dominant (Gg) is 2/4 =1/2 = 50%
• percentage of getting a child that is homozygous recessive (gg) is 2/4 =1/2 = 50%

Answer 2

These percentages are determined based on the fact that each of the 4 offspring boxes in a Punnett square is 25% (1 out of 4). As to phenotypes, 75% will be Y ...