What characterizes terrestrial tetrapods?
A) Lives on land, has four limbs
B) Lives on land, has four sets of chromosomes
C) Lives on land, has four cranial nerves
D) Lives in the water, has four limbs
A
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A phage that replicates inside the host cell and then lyses its host during its release is a
A. virulent or lytic phage. B. latent phage. C. lysogenic phage. D. dormant phage.
The F2 phenotypic ratio of a monohybrid cross is
a. 1:1. b. 2:1. c. 9:3:3:1. d. 1:2:1. e. 3:1.
The greatest contributor(s) to allopatric isolation is
(are) a. geographic barriers. b. differences in reproductive timing. c. gametic incompatibility. d. hybrid inviability. e. behavioral peculiarities.
Huntington's disease is a late-onset autosomal dominant disorder. What is the chance that a heterozygous woman with the disease will pass the affected allele on to her children?
A. 0% B. 25% C. 50% D. 75% E. 100%