Two Characters That Appear in a 9:3:3:1 Ratio in the F₂

question 74

Multiple Choice

Two characters that appear in a 9:3:3:1 ratio in the F₂ generation should have which of the following properties?

• A)Each of the traits is controlled by single genes.
• B)The genes controlling the characters obey the law of independent assortment.
• C)Each of the genes controlling the characters has two alleles.
• D)Four genes are involved.
• E)Sixteen different phenotypes are possible.

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Definitions:

Demography

The statistical study of populations, analyzing structure, distribution, and trends through births, deaths, migration, and aging.

Populations

Groups of individuals belonging to the same species that live in the same area and have the potential to interbreed.

Gerontology

The scientific study of aging and the problems faced by the elderly.

Erik Erikson

A psychoanalyst and developmental psychologist recognized for his theories regarding human psychological growth.