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

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

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!

the backbone of the dna and rna compound is sugar phosphate.