People who can roll their tongues contain a dominant allele for tongue rolling

People who can roll their tongues contain a dominant allele
for tongue rolling. If people do not contain the tongue
rolling gene, then they cannot roll their tongue no matter
how hard they try.

Consider the following situation: If a homozygous dominant
tongue roller mates with a homozygous recessive non-tongue
roller, then what is the probability of the offspring
inheriting the tongue rolling gene?

Question Posted / swapna

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People who can roll their tongues contain a dominant allele for tongue rolling. If people do not c..

Answer / baba_mailme

CONSIDER THE HOMOZYOUS DOMINANT GENE FOR THE TONGUE ROLLER-
TT AND THE HOMOZYOUS RECESSIVE GENE FOR THE TONGUE ROLLER-tt

Now when the two mates the F1 generations will be Tt(all
the offspring will br hetrozyous dominant). On selfing them
the F2 generation produced will be 75% dominant(TT and Tt)
and 25% recessive(tt).
parents TT X tt
gametes T T t t
F1 generation Tt Tt Tt Tt

on selfing Tt x Tt
gametes T t T t
F2 generation TT Tt Tt tt

Is This Answer Correct ?

22 Yes

1 No

People who can roll their tongues contain a dominant allele for tongue rolling. If people do not c..

Answer / sujay

CONSIDER THE HOMOZYOUS DOMINANT GENE FOR THE TONGUE ROLLER-
TT AND THE HOMOZYOUS RECESSIVE GENE FOR THE TONGUE ROLLER-tt

Now when the two get crossed the F1 generations will be
three offsprings having tongue rolling character and one
offspring will be recessive homozygous non-tongue roller in
F1 generation.
p1 parents TT X tt
gametes T T t t
F1 generation TT Tt Tt tt

Is This Answer Correct ?

7 Yes

15 No

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