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Anatomy & Physiology

Study Pack

Set 15 Genetic Variation

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Question 1

(Multiple Choice)

Free
With regard to alleles that encode different forms of the phenylthiocarbamide taste receptor in humans, which options are genotypes?

A)taster
B)PAV/PAV
C)nontaster
D)PAV/AVI
E)aversion to broccoli

Answer

Question 2

(Multiple Choice)

Free
Which of the following statements are TRUE of the Δ\Delta 32 allele in the CCR5 gene?

A)It codes for a mutant protein that is completely inactive.
B)It is a deletion that maintains the reading frame.
C)It provides some protection against HIV progression to AIDS in both its heterozygous and homozygous forms.
D)It is an example of a beneficial mutation.
E)It affects the attachment of HIV to an animal cell by altering one of the viral proteins.

Answer

Question 3

(Multiple Choice)

Free
An individual is heterozygous for a gene if:

A)his or her mother is heterozygous for the gene.
B)his or her father is heterozygous for the gene.
C)he or she developed from a sperm and egg that carried different alleles.
D)he or she developed from a sperm and egg that carried the same allele.
E)only one allele is present in the population.

Answer