Unstable Trinucleotide Repeat Alleles Can Be Observed to Expand in Which

question 19

Multiple Choice

Unstable trinucleotide repeat alleles can be observed to expand in which of the following situations?

• A) During meiosis in a male premutation carrier
• B) During meiosis in a female premutation carrier
• C) During mitosis in an individual with a disease allele
• D) Both A and B
• E) Both B and C

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Definitions:

Xeroderma

Xeroderma is a medical condition characterized by excessively dry skin, often due to decreased production of natural oils and moisture.

Bilateral Aphakia

The absence of the lens in both eyes, which can occur naturally or through surgical removal.

Fluid Pressure

The pressure exerted by a fluid at equilibrium at any given point within the fluid, due to the force of gravity.

Glaucoma

A group of eye conditions resulting in optic nerve damage, often associated with increased pressure in the eye, leading to loss of vision if untreated.