In Some Human Populations,the Proportion of Individuals Who Are Heterozygous

question 23

Multiple Choice

In some human populations,the proportion of individuals who are heterozygous for the sickle cell allele is much higher than would be expected by chance alone.Why?

• A)Individuals with two normal alleles have an advantage over heterozygous individuals.
• B)Individuals with two harmful alleles have an advantage over heterozygous individuals.
• C)Individuals with two harmful alleles have an advantage over individuals with two normal alleles.
• D)Heterozygous individuals have an advantage over individuals with two normal alleles.

---

Definitions:

Power Generation

The process of producing electricity from various energy sources such as fossil fuels, nuclear power, or renewable resources.

Nonrenewable Natural Resources

Natural resources, such as oil or coal, that cannot be replenished within a human lifetime, leading to depletion with use.

Natural Capital

The world's stock of natural resources, which includes geology, soils, air, water, and all living organisms, providing ecosystem services that benefit humans.

Alternative Fuels

Fuels other than traditional sources (like petroleum oils) used for transportation, including electric, hydrogen, biofuels, and natural gas, to reduce pollution and dependency on oil.