Thrifty Genes Are __________ During Times of Starvation and __________

question 41

Multiple Choice

Thrifty genes are __________ during times of starvation and __________ when physical activity is low.

• A) beneficial; beneficial
• B) beneficial; detrimental
• C) detrimental; detrimental
• D) detrimental; beneficial

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Definitions:

Genomic Imprinting

Genomic imprinting occurs when genes inherited from one or the other parent are silenced due to methylation. Imprinting can result in offspring who express either the maternal or paternal copy of the gene, but not both.

Transcription Factors

Proteins involved in the process of converting, or transcribing, DNA into RNA, playing a critical role in regulating gene expression.

Silenced Genes

Genes that are not expressed in the phenotype due to mechanisms that prevent their transcription or translation.

Trivers-Willard Hypothesis

A theory suggesting that parents are likely to have offspring of the sex that will give them the greatest number of surviving grandchildren under certain conditions.