Suppose "A" is a dominant gene for the ability to taste phenylthiocarbamide and "a" is a recessive gene for the inability to taste it.Which couples could possibly have both a child who tastes it and a child who does not?
A)father AA, mother aa
B)father Aa, mother AA
C)father Aa, mother Aa
D)father AA, mother AA

Question

Suppose "A" is a dominant gene for the ability to taste phenylthiocarbamide and "a" is a recessive gene for the inability to taste it.Which couples could possibly have both a child who tastes it and a child who does not?​
A)father AA, mother aa
B)​father Aa, mother AA
C)​father Aa, mother Aa
D)father AA, mother AA

Quizplus · Accepted Answer

When both parents are heterozygous (Aa), there is a chance that each of their offspring will inherit either an A or an a gene from each parent. This means that some of their children may be AA (able to taste PTC), some may be Aa (able to taste PTC but carry the recessive gene), and some may be aa (unable to taste PTC). Therefore, it is possible for this couple to have both a child who tastes PTC (AA or Aa) and a child who does not (aa).

Suppose "A" Is a Dominant Gene for the Ability to Taste