The Gene for a Certain Sex-Linked Trait Is Found Only

question 26

Multiple Choice

The gene for a certain sex-linked trait is found only on the Y chromosome.If the male parent carries this gene,which of the following statements about the inheritance of that trait is true?

• A) The trait will be expressed in 100 percent of the female offspring.
• B) The trait will be expressed in 50 percent of the female offspring.
• C) The trait will be expressed in 100 percent of the male offspring.
• D) The trait will be expressed in 50 percent of the male offspring.

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Definitions:

Humerus

The long bone in the upper arm that runs from the shoulder to the elbow.

Teres Major

A muscle in the upper arm, which helps in the rotation and adduction of the shoulder.

Supraspinatus

A muscle situated on the upper part of the back that assists in the abduction of the arm.

Abducts

Refers to the movement of a limb or other part away from the midline of the body or from another part.