The Fact That Some Monozygotic Twins Are Not a Similar

question 91

Multiple Choice

The fact that some monozygotic twins are not a similar size is support for the basic concept that:

• A) genes determine a person's size.
• B) the environment determines a person's size.
• C) genes and the environment interact to determine a person's size.
• D) height is not a heritable trait.

---

Definitions:

Puberty

The period of life at which one becomes functionally capable of reproduction.

Pineal Body

A tiny gland in the brain that secretes melatonin, a hormone that controls sleep cycles.

Under Sternum

Refers to the area located beneath the sternum or breastbone, a central location in the chest.

Thymus

A gland located in the upper chest that helps develop the body's immune system in early life.