Question

A woman with attached (recessive) earlobes has a child with a man who is heterozygous for earlobes.

What are the odds the child is a female with attached earlobes?

Answer 1

50%

Step-by-step explanation:

The mother's genes are aa, and the father's genes are Aa. When you do the punnett square you get the following in the square:

Aa aa

Aa aa

The only way a child will have attached earlobes is to be aa. There are 2 possibilities out of 4 total. 2/4 = 50%. Thus for a child to have attached earlobes is 50%

Answer 2

you’d have a 50% chance, or a 2/4