When It Comes to Longevity, Research Has Found That Heredity

question 36

True/False

When it comes to longevity, research has found that heredity is the major factor in determining how long a person will live. Environmental factors provide some input, but very little.

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Definitions:

Heterozygous

Having two different alleles at a specific locus on a pair of homologous chromosomes, resulting in genetic variation.

Genetic Locus

A specific, fixed position on a chromosome where a particular gene or genetic marker is located.

X Chromosomes

One of the two sex chromosomes, present in both males (XY) and females (XX), that determine sexual differentiation in humans.

Phenylalanine Hydroxylase

An enzyme that converts phenylalanine into tyrosine, thus playing a crucial role in amino acid metabolism.