Suppose a Three-Point Testcross Was Conducted Involving Genes X, Y

question 29

Multiple Choice

Suppose a three-point testcross was conducted involving genes X, Y, and Z.If the most abundant classes of progeny are X Y z and x y Z and the rarest classes are x Y Z and X y z, which gene is in the middle?

• A)X
• B)Y
• C)Z
• D)cannot be determined

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Definitions:

Afferent

Conducting toward a central nervous system (CNS) structure.

Muscle Spasticity

A condition characterized by an abnormal increase in muscle tone or stiffness, which can interfere with movement, speech, or cause discomfort and pain.

Dyskinesia

A category of movement disorders characterized by involuntary muscle movements, often as a side effect of long-term medication use.

Cerebral Palsy

A neurological disorder caused by a non-progressive brain injury or malformation that occurs while the child’s brain is under development, affecting body movement and muscle coordination.