Two Copies of the Gene a Exist in a Diploid

question 55

Multiple Choice

Two copies of the gene A exist in a diploid mammal. However, only one copy is expressed in every somatic cell. Different somatic cells in the body of each organism have inactivated one or the other allele in a seemingly random fashion, but when they divide, the daughter cells inherit the choice of the inactive allele faithfully. This is an example of …

• A) X-inactivation
• B) Genomic imprinting
• C) Loss of heterozygosity
• D) Monoallelic gene expression
• E) Alternative gene splicing

---

Definitions:

Completed Examination

The conclusion of a thorough medical assessment, which involves evaluating the body by a healthcare provider for any signs of disease or abnormalities.

Sequela

A state of health that emerges as an outcome of an earlier medical condition or harm.

Eponym

A person after whom a discovery, invention, place, etc., is named or thought to be named.

Sequela

A condition which is the consequence of a previous disease or injury.