A Human Female Is Heterozygous for a Recessive X-Linked Trait

question 139

Multiple Choice

A human female is heterozygous for a recessive X-linked trait.She has children with a male who does not have the trait.Their sons have a _______ probability of expressing the trait, whereas their daughters have a _______ probability of expressing the trait.

• A) 0; 0
• B) 0.25; 0.25
• C) 0.5; 0
• D) 0.5; 0.5
• E) 1; 0.5

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Definitions:

Endocrine System

A network of glands in the body that produce and release hormones directly into the bloodstream to regulate the body's growth, metabolism, and sexual development and function.

Ductless Glands

Glands that secrete hormones directly into the bloodstream rather than through ducts, also known as endocrine glands.

Hormones

Chemical messengers produced by the endocrine glands that regulate various bodily functions, such as growth, metabolism, and mood.

Cerebral Cortex

The outer layer of the brain's cerebrum, involved in complex thought processes, perception, and motor function.