Which of the Following Is True of Birth Control Pills

question 18

Multiple Choice

Which of the following is true of birth control pills?

• A) They prevent ovulation by maintaining consistently high levels of progesterone.
• B) They prevent fertilization by changing the chemical makeup of the protective "shell" of the egg so that it cannot be penetrated by sperm.
• C) They prevent sperm from entering the uterus.
• D) They break down the synchronicity of ovulation and preparation of the uterus so that when the egg is released,the uterus is not at the right stage to receive it.

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Definitions:

Heterozygous

A genetic condition where an individual has two different alleles for a specific gene.

Complete Dominance

a genetic condition where one allele completely masks the effect of another allele in a heterozygous combination.

Dominant Gene

A gene that expresses its phenotype in the presence of another allele.

Homozygous

A genetic condition where an individual has two identical alleles for a particular trait or gene.