Achondroplasia Achondroplasia Is an Autosomal Dominant Disorder,however Homozygous Dominant Individuals Do

question 129

Multiple Choice

Achondroplasia
Achondroplasia is an autosomal dominant disorder,however homozygous dominant individuals do not have achondroplasia - they either die before birth or very shortly thereafter.The homozygous recessive condition is normal.A dwarf couple decide to have children.Use this information to answer the following question(s) .
-In the example above,what is probability that the couple will have a child with achondroplasia?

• A) 0
• B) 1/4
• C) 1/3
• D) 2/3
• E) 1/2

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Definitions:

Contraction

The process in which muscle fibers shorten in length, resulting in movement or force generation.

Connective Tissue

A type of biological tissue with the primary function of supporting, connecting, or separating different types of tissues and organs in the body.

Transport

The movement of substances across cell membranes and throughout the body.

Exocrine

Glands that secrete their products through ducts either out of the body or into the digestive system, unlike endocrine glands, which secrete hormones directly into the blood.