Erin Finds It Terribly Difficult to Establish a Regular Sleep-Wake

question 414

Multiple Choice

Erin finds it terribly difficult to establish a regular sleep-wake cycle.Lately,she has been suffering from insomnia.In diagnosing the problem,a medical doctor might want to check the functioning of which gland(s) ?

• A)the thyroid gland
• B)the pancreas
• C)the adrenal glands
• D)the pineal gland

---

Definitions:

Dominance

In genetics, the phenomenon where one variant of a gene (allele) masks or overrides the expression of a different allele at the same locus.

Recessive Allele

An allele that produces its characteristic phenotype only when its paired allele is identical.

Heterozygous

A genetic condition where an individual has two different alleles at a specific locus on a chromosome, resulting in a mixture of genetic information for a particular trait.

Achromatopsia

Achromatopsia is a rare, non-curable eye condition characterized by total color blindness, visual acuity loss, and light sensitivity due to the absence or malfunction of cone cells in the retina.