Some Identical Twins Have the Same Genetic Makeup but Look

question 73

Multiple Choice

Some identical twins have the same genetic makeup but look slightly different. Their slight differences in observable appearance are an example of _______, which are influenced by both biology and environment.

• A) genotypes
• B) environmental selections
• C) phenotypes
• D) habitats
• E) neurons

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Definitions:

5-hydroxyindoleacetic acid

A primary metabolite of serotonin, used as a chemical marker to evaluate serotonin function in the body.

Problem-solving Skills

Abilities utilized to identify, define, and solve problems through systematic and creative approaches.

Gene-splicing

A biotechnological method that involves altering the genetic material of an organism by recombining DNA fragments.

Serotonin Level

The concentration of the neurotransmitter serotonin in the brain, which influences mood, emotion, and sleep.