Recessive Genes Are Usually Expressed in Humans Only When ________

question 113

Multiple Choice

Recessive genes are usually expressed in humans only when ________.

• A) the organism is in the embryonic stage
• B) they are coding for skin color
• C) they are coding for genetic diseases
• D) both alleles are exactly the same, or homozygous

---

Definitions:

Hypothyroidism

A condition where the thyroid gland doesn’t produce enough thyroid hormones, leading to symptoms like fatigue, weight gain, and cold intolerance.

Hypertension

A chronic medical condition characterized by persistently elevated blood pressure in the arteries, often leading to significant health risks.

Depression

(1) Reduction in happiness and well-being that contributes to physical and social limitations and complicates the treatment of concomitant medical conditions. It is usually reversible with treatment. (2) Fourth stage of Kübler-Ross's stages of grief and dying. In this stage the person realizes the full impact and significance of the loss.

Narcolepsy

Syndrome involving sudden sleep attacks that a person cannot inhibit. Uncontrollable desire to sleep may occur several times during a day.