In metaphase I ________ are aligned along the metaphase plate, and in metaphase II ________ are aligned along the metaphase plate
A) homologous chromosomes; tetrads
B) homologous chromosomes; pairs of sister chromatids
C) maternal chromosomes; paternal chromosomes
D) pairs of sister chromatids; homologous chromosomes
Answer: B
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Genetic drift has an especially significant effect in what kind of populations?
A. populations that are large B. populations that are small C. populations with high genetic variability D. populations that are in Hardy-Weinberg equilibrium E. populations that are migrating
What is the difference between a genetic disorder and a genetic abnormality?
a. There is no difference between a disorder and an abnormality b. The abnormality is always caused by environmental stimuli. c. The disorder will kill the individual while the abnormality is not life threatening. d. The disorder is always caused by environmental stimuli. e. The abnormality will kill the individual while the disorder is not life threatening.
The nephron begins in the ____
a. glomerulus b. loop of Henle c. cortex d. ureter e. medulla
Which of the following groups contains organisms that produce free-living larvae?
a. cnidarians b. echinoderms c. arthropods d. cnidarians and echinoderms e. cnidarians, echinoderms, and arthropods