Who is a "carrier" of X-linked disorders, such as hemophilia and color blindness?

A) a male who carries the functioning allele
B) a homozygous female who carries the normal alleles
C) a male who carries the nonfunctioning allele
D) a person who has the X-linked disorder
E) a heterozygous female who is normal but carries one nonfunctioning allele


Answer: E

Biology & Microbiology

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because they emerged from a common node.

a. chimpanzees; orangutans b. orangutans; humans c. gorillas; chimpanzees d. gorillas; both chimpanzees and humans e. old world monkeys; both chimpanzees and humans

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Diatoms reproduce by binary fission

Indicate whether the statement is true or false

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Prokaryotic transcription begins when RNA polymerase binds to which site of the gene region?

A) -35 B) -10 C) +1 D) +10 E) +35

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Which mode of transmission is not addressed by transmission precautions?

A) airborne B) direct contact C) droplet D) vector E) airborne and droplet

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