A Woman and a Man Are Both Heterozygous for a Recessive

question 49

Multiple Choice

A woman and a man are both heterozygous for a recessive allele for a rare genetic disease. If they have one child, what is the probability that he or she will be affected? If they have two children, what is the probability that at least one of them will be affected?

• A)7/16, 1/4
• B)1/4, 3/4
• C)3/4, 1/4
• D)3/4, 7/16
• E)1/4, 7/16

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Definitions:

Tissue Types

The four basic types of tissue in the body, including epithelial, connective, muscle, and nervous tissues.

Organs

Structures made of different tissues that perform specific functions within an organism.

Connective Tissue

A type of biological tissue that supports, connects, or separates different types of tissues and organs in the body.

Mutations

Changes in the DNA sequence of an organism's genome, which can lead to variations in physical traits or affect the organism's health.