Emma and Anna Are Identical Twins Who Were Adopted by Different

question 109

Multiple Choice

Emma and Anna are identical twins who were adopted by different families a few weeks after birth.Although genetically identical,they grew up with different physical and psychological characteristics.For example,though both inherited a tendency to grow large,Anna was slim and athletic due to the active lifestyle practiced in her adoptive family.This variability can be explained by how:

• A)each zygote is unique.
• B)longevity genes can make an individual less vulnerable to certain diseases.
• C)for each genotype,a range of phenotypes can be expressed.
• D)mutated genes can be a source of genetic variability.

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Definitions:

Episodic Memory

The type of long-term memory that involves the recollection of specific events, situations, and experiences, including contextual details such as time and place.

Knitting

A method by which yarn is manipulated to create a textile or fabric, often used in making clothes.

Medial Temporal Lobes

Regions of the brain crucial for the formation of new memories involving the hippocampus and surrounding areas.

Explicit Memories

Memories of facts and experiences that an individual can consciously recall and describe.