Which is the physical basis for creating genetic variation in offspring as a result of meiosis?
a. Genetic mutation
b. Independent assortment
c. Fertilization
d. Cytokinesis
b. Independent assortment
Independent assortment is the physical basis for creating genetic variation in offspring as a result of meiosis.
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Which of the following is true about stem cells?
a. All stems cells can develop into any other type of cell. b. Stem cells are unspecialized cells. c. Stem cells are undifferentiated cells derived from embryonic cells. d. Stems cells undergo meiosis to repair damaged tissue.
The probability that the daughter of a woman with a dominant disease-causing allele on one X chromosome and a normal male will be affected with the disorder is
A) 2/3. B) 1/2. C) 3/16. D) 1/3.
Which of the following statements is true about a phylogeny, as represented by a phylogenetic tree?
I) Descendant groups (branches) from the same node do not necessarily share any derived characters. II) A monophyletic group can be properly based on convergent features. III) The ancestral group often has all the synapomorphies of the descendant species. A) only I B) only II C) only III D) None. Not I, II, or III.
How long are MOST bacteria?
a) 0.2 to 2 ?m b) 1 to 4 ?m c) 2 to 8 ?m d) 5 to 15 ?m