Research on the Genetic and Environmental Influences on Body Weight

question 32

Multiple Choice

Research on the genetic and environmental influences on body weight has revealed that

• A) the weight of adopted people correlates with that of their biological parents,not with that of their adoptive parents.
• B) the weight of fraternal twins reared together is more highly correlated than the weight of identical twins reared apart.
• C) obesity is somewhat less common among Americans today than 50 years ago.
• D) identical twin men are more similar in weight than identical twin women.

---

Definitions:

Chromosome 15

A specific chromosome in humans that carries genetic information, including genes associated with various disorders and physical traits.

Repressible Genes

Genes that can be turned off by the products of other genes in response to certain conditions.

TATA Box

A component of a eukaryotic promoter region; consists of a sequence of bases located about 30 base pairs upstream from the transcription initiation site.

RNA Polymerase

A crucial enzyme responsible for synthesizing RNA from a DNA template, playing a key role in the process of transcription.