Data for an Autosomal Recessive Trait Shows That Heterozygous Individuals

question 16

Multiple Choice

Data for an autosomal recessive trait shows that heterozygous individuals have the highest relative fitness. Those who are unaffected and homozygous for the dominant A allele have a relative fitness of 84% compared to heterozygous individuals, but only about 30% of those who are affected survived to reproduce. What is the estimated equilibrium frequency for allele A in this population?

• A) 0.700
• B) 0.160
• C) 0.186
• D) 0.814
• E) 0.357

---

Definitions:

Stressor

A factor or event that causes stress to an organism.

Carcinogen

A substance or a form of radiation that can induce cancer or significantly increase the risk of developing cancer.

Fight Or Flight

A physiological response to perceived harmful events, attacks, or threats to survival, preparing the body to either confront or flee from the situation.

Acculturative Stress

The psychological impact of adaptation to a new culture.