Why Is It That Monozygotic Twins Share 100% of Their

question 33

Multiple Choice

Why is it that monozygotic twins share 100% of their genes?

• A) Because they are the result of two sperm cells fertilizing the same egg, and thus that egg make sure to choose only the same genes from each of the sperm cells.
• B) Because they are the result of one zygote that split in two, making a perfect replica of itself.
• C) Because they are the result of two zygotes being formed at precisely the same time.
• D) Because they are born at the same time, and thus have the same start to their phenotypical development.

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Definitions:

Likely Products

Refers to the expected substances that result from a chemical reaction, based on the reactants and conditions.

Predominate Product

The main or most abundant product formed in a chemical reaction under the given set of conditions.

Major Product

The product that is formed in the greatest amount in a chemical reaction.

Geminal Dihalide

Organic compounds where two halogen atoms are attached to the same carbon atom.