How many sperm cells are produced for every one primary spermatocyte?
A. 8
B. 2
C. 4
D. 12
Answer: C
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In the conversion of pyruvate to ethanol, which of the
following is (are) produced? a. acetaldehyde b. carbon dioxide c. NADH d. acetaldehyde and carbon dioxide only e. acetaldehyde, carbon dioxide, and NADH
Your friend has never gardened before. When none of the seeds he planted germinate, he asks you to suggest why. Which is the best explanation of what occurred?
A. The monocot seeds he used were only able to produce a single cotyledon each. B. The seeds were planted too deeply and used up their reserves before reaching the surface and sunlight. C. The suspensor failed to develop into an embryo within each seed. D. All seeds require fire in order to germinate. E. Seeds take more than one season to germinate.
In rabbits, four alleles exist for the c gene. The wild-type version, C+C+, is expressed as brown fur. The chinchilla phenotype, cchcch, is expressed as black-tipped white fur. The Himalayan phenotype, chch, has black fur on the extremities and white fur elsewhere. Finally, the albino, or “colorless” phenotype, cc, is expressed as white fur. This is an example of which type of inheritance?
a. codominance b. multiple mutations c. multiple alleles d. recessive lethal
If all the offspring of a testcross are alike and
resemble the organism being tested, then that parent is a. homozygous dominant. b. homozygous recessive. c. heterozygous. d. recessive. e. incompletely dominant.