Use the Following to Answer Questions

question 9

Multiple Choice

Use the following to answer questions :
Cleft chin is an X-linked dominant trait.Assume that a man with a cleft chin marries a woman with a round chin.
-What percent of their male progeny will show the cleft chin trait?

• A) 0 percent
• B) 25 percent
• C) 50 percent
• D) 75 percent
• E) 100 percent

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Definitions:

Limbic System

A complex system of nerves and networks in the brain, involved with instinct and mood control, as well as the processing of emotions and memories.

Control

In experimental contexts, a standard condition against which results are compared, ensuring the experiment measures the effect of the independent variable.

Voltage-Gated

Referring to ion channels that open or close in response to changes in the electrical potential across a cell membrane.

Sodium Channels

Proteins located in cell membranes that facilitate the passage of sodium ions into and out of the cell, essential for processes such as nerve impulse transmission.