__________ Develop When Two Eggs Each Get Fertilized by Two

question 232

Multiple Choice

__________ develop when two eggs each get fertilized by two different sperm, resulting in two zygotes in the uterus at the same time.

• A) Monozygotic twins
• B) Fraternal twins
• C) Dizygotic twins
• D) Wombmates

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Definitions:

Genetic Drift

A mechanism of evolution involving random fluctuations in the frequency of alleles within a population, which can cause genetic variation to decrease over time.

Bottleneck

A sudden decrease in a population size caused by adverse environmental factors; may result in genetic drift; also called genetic bottleneck or population bottleneck.

Directional Selection

A type of natural selection that favors one extreme phenotype over another, causing the allele frequency to shift in one direction.

Disruptive Selection

A form of natural selection where extreme values for a trait are favored over intermediate values, potentially leading to the evolution of distinct forms within a population.