Approximately How Many Times Does an Average Human Heart Beat

question 42

Multiple Choice

Approximately how many times does an average human heart beat in a year?

• A)4 ×
• B)4 ×
• C)4 ×
• D)4 ×
• E)4 ×

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Definitions:

Mutation

An alteration in the molecular structure of an individual’s DNA.

DNA

Deoxyribonucleic acid, a molecule that contains the genetic instructions for the development, functioning, growth, and reproduction of all known living organisms and many viruses.

Heterozygous

Referring to an organism that has two different alleles for a specific gene, one inherited from each parent.

Dominant Allele

An allele that expresses its phenotypic effect even when heterozygous with a recessive allele.