In a Family, Both Parents Have Freckles and Widow's Peak

question 60

Multiple Choice

In a family, both parents have freckles and widow's peak. Both of these traits are dominant: F = freckles, W = widow's peak. What is the correct phenotypic ratio of the next generation if the parents were heterozygous? The order of the genotypes is: freckled with widow's peak; freckled, straight hairline; no freckles with widow's peak; no freckles, straight hairline.

• A) 9:3:1:1
• B) 9:3:3:1
• C) 9:1:1:3
• D) 1:3:3:9

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Definitions:

Probability Distribution

A mathematical equation that provides the probability values for different possible experiments' outcomes.

Coefficient of Determination

A statistical measure, often denoted as R², indicating the proportion of the variance in the dependent variable predictable from the independent variable(s).

Independent Variables

Variables in an analysis that are manipulated or categorized to determine their effect on dependent variables.

Variation

The measure of the spread or dispersion of a set of values in a particular dataset or sampling.