Refer to the Diagram Below Showing a Pedigree of a Sex-Linked

question 116

Multiple Choice

Refer to the diagram below showing a pedigree of a sex-linked recessive trait. In generation II, female number 5 marries a man and has three children. One daughter and one son do not have the recessive trait; the other son does have the recessive trait. Based on these results, one can conclude that

• A) the mother is heterozygous for the trait.
• B) the mother is homozygous for the trait.
• C) a mutation has occurred.
• D) the father is heterozygous for the trait.
• E) the father is homozygous for the trait.

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Definitions:

Fear of Falling

An ongoing concern about falling that can lead to avoiding activities believed to increase the risk of falling.

Bone Mass

The amount of mineralized bone tissue in the body, critical for supporting structures, mobility, and overall health.

Menopause

The end of menstruation and a woman’s reproductive capacity.

Osteoarthritis

The most common type of arthritis; it affects joints that are injured by overuse, most commonly the hips, knees, lower back, and hands, in which the cartilage protecting the ends of the bones where they meet at the joints wears away, and joints become less flexible and swell.