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
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On a phylogenetic tree for Anthropoidea, the clade that includes ____ and the clade that includes ____ are sister taxa
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
Diatoms reproduce by binary fission
Indicate whether the statement is true or false
Prokaryotic transcription begins when RNA polymerase binds to which site of the gene region?
A) -35 B) -10 C) +1 D) +10 E) +35
Which mode of transmission is not addressed by transmission precautions?
A) airborne B) direct contact C) droplet D) vector E) airborne and droplet