DNA Is Held Together in a Double Helix by the Force

question 257

Multiple Choice

DNA is held together in a double helix by the force of

• A) the twists.
• B) covalent bonds.
• C) ionic bonds.
• D) ionic interactions.
• E) hydrogen bonds.

Comprehend the genetic basis and impact of mutations such as in phenylketonuria (PKU).

Explain the principles of incomplete dominance, codominance, epistasis, pleiotropy, and polygenic inheritance.

Analyze and explain patterns of heredity using genotypic and phenotypic information.

Distinguish among the concepts of genetics, heredity, genetic variation, locus, allele, phenotype, and genotype.

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Definitions:

Sympathetic

Pertaining to the part of the autonomic nervous system that typically prepares the body for intense physical activity and is often referred to as the fight-or-flight response.

Parasympathetic

Pertaining to the division of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles.

Sympathetic

Part of the autonomic nervous system that increases the body's readiness for action in stress situations.

Parasympathetic

Part of the autonomic nervous system that conserves energy by slowing the heart rate, increasing intestinal and gland activity.