Deleterious Alleles (Lethal Recessives) Can Remain at Low Frequencies in Populations

question 39

Multiple Choice

Deleterious alleles (lethal recessives) can remain at low frequencies in populations because

• A) mutation can alter the allele to decrease its lethality.
• B) most individuals who carry the gene are heterozygous and do not suffer consequences of having two copies of the gene.
• C) heterozygotes most often pass on the dominant allele.
• D) many, but not all, homozygous recessive individuals die.

---

Definitions:

Adjustment Problems

Difficulties in adapting to or coping with new situations, environments, or conditions that can lead to psychological stress or dysfunction.

Divorced-Family Situation

Refers to the family dynamic and circumstances resulting from the legal dissolution of a marriage, impacting both children and adults involved.

Adjustment Problems

Refers to difficulties in coping with new, challenging situations or transitions, often leading to emotional or behavioral issues.

Divorced-Family Situation

A family structure resulting from the legal termination of a marriage, influencing the dynamics and relationships within the family.