Mutations of Regulatory Elements of Developmental Genes May Have Either

question 28

Multiple Choice

Mutations of regulatory elements of developmental genes may have either dominant or recessive effects. If a mutation deletes a silencer upstream of a HOX gene, which do you expect?

• A) a dominant trans effect on both alleles of the HOX gene
• B) a dominant effect in which cis HOX gene activity is up- regulated
• C) a dominant effect which down- regulates HOX gene activity
• D) a recessive effect in which cis HOX genes are down- regulated
• E) a recessive effect in which cis HOX genes are up- regulated

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Definitions:

Procedural

relates to the methods and processes used to perform tasks or operations in a systematic manner.

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Pertaining to the type of memory that involves facts and information that can be consciously recalled.

Implicit

Something suggested or understood without being directly expressed, often referring to unconscious processes or memories.

Explicit

Information or material that is fully and clearly expressed, leaving no room for confusion or doubt.