Which of the following is the correct order of the stages of meiosis?
a. prophase I, metaphase I, anaphase I, telophase I, cytokinesis, prophase II, metaphase II, anaphase II, telophase II, cytokinesis
b. prophase I, prometaphase I, metaphase I, anaphase I, telophase I, cytokinesis, prophase II, prometaphase II, metaphase II, anaphase II, telophase II, cytokinesis
c. prophase I, metaphase I, prometaphase I, anaphase I, telophase I, prophase II, prometaphase II, metaphase II, anaphase II, telophase II, cytokinesis
d. prophase I, metaphase I, prometaphase I, anaphase I, telophase I, prophase II, metaphase II, prometaphase II, anaphase II, telophase II, cytokinesis
b. prophase I, prometaphase I, metaphase I, anaphase I, telophase I, cytokinesis, prophase II, prometaphase II, metaphase II, anaphase II, telophase II, cytokinesis
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What color is a plant with the genotype GgAa?
A horticulturist is breeding a new variety of houseplant in which two genes control leaf color. G (allele for green) is dominant to g (yellow) and B (second allele for green) is dominant to b (yellow). The recessive homozygous condition of either gene will mask a dominant allele. A. green B. yellow C. an intermediate yellow-green D. variegated (yellow and green spots or stripes) E. The color cannot be determined with the information given.
The effects of nerve gas prevent the removal of acetylcholine from synapses by interfering with its ____
a. diffusion away from the synaptic cleft b. enzymatic degradation c. active pumping back into the neuron d. binding to its respective receptor e. ability to flux ions across the membrane of the receiving neuron
Which statement about saturated fatty acids is false?
A) They have a higher melting point than unsaturated fatty acids. B) They form straight, instead of bent, chains. C) No carbon-carbon double bonds are present in the hydrocarbon chain. D) The hydrocarbon chain always includes an odd number of subunits. E) They consist of a polar, hydrophilic "head" and a nonpolar, hydrophobic "tail."
If a change in allele frequency at one locus does not result in the change in allele frequency at a second locus, one can assume that these loci:
a. support Mendel's Law of Segregation. b. are unlinked. c. support Darwin's view of heredity. d. are dominant. e. None of the above.