Which Scenario Would Most Support a Hypothesis That the Environment

question 163

Multiple Choice

Which scenario would most support a hypothesis that the environment plays little or no role in epigenetic modifications?

• A) Identical twins at age 3 show considerable difference in their methylation patterns.
• B) Identical twins at age 3 show little difference in their methylation patterns.
• C) Identical twins at age 50 show considerable difference in their methylation patterns.
• D) Identical twins at age 50 show little difference in their methylation patterns.
• E) Identical twins at age 3 show considerable difference in their histone acetylation patterns.

Gain an insight into the history of life on Earth, including the estimated ages of key evolutionary milestones.

Appreciate the evidence provided by the fossil record in supporting the theory of evolution and understanding evolutionary processes.

Understand the principles of comparative anatomy, embryology, and biochemistry in demonstrating evolutionary relationships.

Recognize the role of genetic variation within populations in evolution and how mechanisms such as natural selection, genetic drift, and gene flow contribute to evolution.

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Definitions:

Genetic Equilibrium

The condition of a population that is not undergoing evolutionary change (i.e., in which allele and genotype frequencies do not change from one generation to the next). See Hardy–Weinberg Principle.

Allele Frequencies

The proportion of various alleles of a gene in a population, which can change over time due to evolutionary pressures, genetic drift, mutation, and gene flow.

MN Blood Type

A blood group system classifying human blood based on the presence or absence of the M and N antigens on the surface of red blood cells.

Genotype Frequency

The proportion of a particular genotype in the population. Compare with allele frequency and phenotype frequency.