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

question 46

Multiple Choice

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

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Definitions:

Axon Terminal

The end of an axon, which makes synaptic connections with another nerve cell or with a muscle or gland cell, allowing for the transmission of electric nerve impulses.

Neurotransmitter

Chemical substances released at the end of a nerve fiber by the arrival of a nerve impulse, which by diffusing across the synapse or junction causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure.

T-tubule

Tubular extensions of the cell membrane in muscle cells, which play a critical role in the conduction of electrical signals for muscle contraction.

Action Potential

A short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, allowing nerve cells to communicate.