Question

Two people (both heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (T). The inability to taste PTC is caused by a recessive allele (t). What proportion of their children would be expected to have the ability to taste PTC?
a. 3/4
b. 1/2
c. All
d. 1/4
e. 2/3

Answer

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