In Humans, Identical Twins Are Possible Because ________

question 59

Multiple Choice

In humans, identical twins are possible because ________.

• A) cytoplasmic determinants are distributed unevenly in unfertilized eggs
• B) extraembryonic cells interact with the zygote nucleus
• C) early blastomeres can form a complete embryo if isolated
• D) the gray crescent divides the dorsal-ventral axis into new cells

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Definitions:

Abuse

Involves the mistreatment of an individual, often resulting in physical, emotional, or sexual harm, frequently within a context of power imbalance.

Mesoderm

The middle layer of an embryo in early development that gives rise to muscles, bones, and circulatory systems.

Endoderm

The innermost layer of cells or tissue of an embryo in early development, giving rise to the digestive and respiratory systems.

Ectoderm

The outermost layer of cells or tissue of an embryo in early development, giving rise to the formation of the nervous system and skin.