A Man Who Is a Dwarf with Achondroplasia and Normal

question 46

Multiple Choice

A man who is a dwarf with achondroplasia and normal vision marries a colour-blind woman of normal height. The man's father was six feet tall, and both the woman's parents were of average height. Dwarfism caused by achondroplasia is autosomal dominant, and red-green colour blindness is X-linked recessive. How many of their daughters might be expected to be colour-blind with achondroplasia?

• A) none
• B) half
• C) one out of four
• D) three out of four

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Definitions:

Hypothesis

A proposed explanation for an observation or phenomenon, set forth as a basis for further investigation.

Experiment

A study of causal relationships in which the researcher manipulates an independent variable to examine its effect on a dependent variable.

Meta-analysis

A statistical technique used to combine the results of multiple studies on a specific topic to derive a comprehensive understanding of the research area.

Statistical Test

A mathematical procedure used to determine if there is a significant difference between two or more groups or variables.