Which Statement or Factor Is a Criterion for Autosomal-Recessive Transmission

question 28

Multiple Choice

Which statement or factor is a criterion for autosomal-recessive transmission of single-gene traits?

• A)About 25% of the members of a large kindred with an autosomal-recessive trait will express the trait.
• B)There is no carrier status; if the allele for the trait is present, it is expressed, although the degree of expression can be variable.
• C)Individuals who are heterozygous for an autosomal-recessive trait have minimal risk for transmitting the allele to their offspring.
• D)The degree of expression of an autosomal-recessive trait or disorder in a homozygous individual is directly related to the penetrance of the trait.

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Definitions:

Hypothalamus

A small but crucial part of the brain located below the thalamus, responsible for hormone production and regulation of key bodily functions such as temperature, hunger, and the sleep-wake cycle.

Muscles

Tissues in the body that have the ability to contract, enabling movement and force.

Transduction

The conversion of one form of energy into another form, especially in sensory perception.

Sensory Quality

Characteristics of an object or experience that are perceived through the senses, such as taste, sound, smell, texture, or visual appearance.