Question

The gene for tongue rolling is dominant. The mother’s genotype is TT and the father’s genotype is TT. What are the chances that he will be able to roll his tongue?

25% chance
50% chance
75% chance
100% chance
@dtan5457

Answer 1

@dtan5457

Answer 2

@dtan5457 come back!!!

Answer 3

@GretaKnows

Answer 4

@matt101

Answer 5

T is the dominant allele, so if you have T, you can roll your tongue, no matter what the other allele is.

Each parent randomly passes on one of their two alleles to their offspring. In this case, both parents have two T alleles, meaning ONLY T alleles can be passed on to the offspring, because there are no alternatives. So the chance of the offspring being able to roll his tongue is...?