A Man with Normal Vision Who Is a Dwarf Due

question 17

Multiple Choice

A man with normal vision who is a dwarf due to achondroplasia has children with a woman who is colorblind and of average height. Dwarfism caused by achondroplasia is autosomal dominant, and red-green color blindness is X-linked recessive. What proportion of their sons are expected to be color blind and of normal height?

• A) 0
• B) 1/2
• C) 1/4
• D) all

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Definitions:

School-Cutoff Strategy

A means of assessing the impact of early education by comparing the intellectual performance of children who are almost the same age but begin schooling a year apart because of school rules that set a specific cutoff birthday date for starting school.

Family Support

Assistance and resources provided by family members to each other to ensure mutual well-being and address challenges.

Home Discourse

Conversations and communication patterns that occur within a household among family members.

African American Families

Families identified or classified as having African American heritage, foregrounding the unique cultural, historical, and social experiences within the United States.