Question

Facial dimples and free earlobes are both considered dominant human traits. What are the expected phenotypes of the offspring of a female with dimples and free earlobes (DDFf) and a male with no dimples and attached earlobes (ddff)? a 75% with dimples and free earlobes and 25% with no dimples and attached earlobes b 50% with dimples and free earlobes and 50% with no dimples and attached earlobes c 50% with dimples and free earlobes and 50% with dimples and attached earlobes d 75% with dimples and attached earlobes and 25% with no dimples and free earlobes

Answer 1

c 50% with dimples and free earlobes and 50% with dimples and attached earlobes

Step-by-step explanation:

As mentioned in the question,Facial dimples and free earlobes are both considered dominant human traits. We have been asked that what is the expected offspring of a female with dimples and free earlobes (DDFf) and a male with no dimples and attached earlobes (ddff).

Lets cross them:

P1: DDFf X ddff

Gametes: DF: Df : df: df

Offspring:

50% : Dfdf: with dimples and free earlobes

50%: DdFf: dimples and attached earlobes

You can see the cross for a better understanding in attached image that how i created a punnet square to get the results of the cross.

Hope it helps!