Assuming That the Trait Represented by the Filled Symbols Below

question 47

Multiple Choice

Assuming that the trait represented by the filled symbols below is a rare inherited trait with complete penetrance due to a single gene with alleles A and a, what mode of inheritance does the pedigree suggest?

• A)dominant
• B)recessive

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Definitions:

Neurotransmitters

Chemical messengers that transmit signals across a chemical synapse, from one neuron (nerve cell) to another target neuron, muscle cell, or gland cell.

Hypothalamus

A region of the brain that regulates various bodily functions including hunger, thirst, sleep, and hormonal secretions.

Testosterone

A steroid hormone primarily produced in the male testes and female ovaries, associated with the development of secondary sexual characteristics and influencing behavior.

Aggression

A range of behaviors that can result in both physical and psychological harm to oneself, others, or objects in the environment.