The HIV virion is best described as a(n)
A) segmented RNA genome in an irregular polyhedron capsid with envelope.
B) unsegmented RNA genome in a helical capsid with an envelope.
C) unsegmented RNA genome in a long flexible helical capsid with envelope.
D) segmented RNA genome in an icosahedral capsid, without envelope.
E) segmented RNA genome in helical capsids and an envelope.
A
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In garden peas, smooth seeds are dominant to wrinkled ones, and yellow pea color is dominant to green. In a dihybrid cross of SsYy x SsYy, what proportion of the offspring from this cross is expected to be both smooth and yellow?
1.9/16
2.3/16
3.1/16
4.none
When an F' plasmid acts as the donor in a mating, which of the following do(es) not happen?
A. The plasmid is transferred, including the chromosomal genes now on the plasmid. B. The recipient becomes F'. C. Some chromosomal genes not on the plasmid are transferred. D. All of the choices are correct.
Current theories hold that hominin species migrated out of Africa
A) once, 10 million years ago. B) once, nearly 800,000 years ago. C) once, about 150,000 years ago. D) once, nearly 2 million years ago. E) multiple times throughout history.
A person who has a recessive disorder but does not have the disorder him or herself is said to be a/an:
A) carrier. B) aneuploid. C) aberration. D) hybrid.