During anaphase I, which best represents segregation of the chromatids that make up one pair of homologues? (M represents a maternal chromatid and P represents a paternal chromatid. Assume no crossing over occurs.)
A. M and M to one pole; P and P to the other pole.
B. M and P to one pole; M and P to the other pole.
C. M to one pole; P to the other pole.
D. half of M and half of P to each pole.
E. the segregation of these chromatids is completely random.
A. M and M to one pole; P and P to the other pole.
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When DNA is transferred into a prokaryotic cell it may
A) be degraded by enzymes. B) replicate independent of the host chromosome. C) recombine with the host chromosome. D) be degraded by enzymes, replicate independent of the host chromosome, or recombine with the host chromosome.
You find a unicellular organism that forms lobe-like pseudopodia. When you expose the cells to
cAMP, they aggregate into a slug like structure. Based on this information, you correctly conclude that this organism is: a. Entamoeba histolytica. b. Dictyostelium discoideum. c. Chaos carolinense. d. Chlamydomonas. e. Physarum polycephalum
What is the apparent purpose for X inactivation in humans and other mammals?
A. It enhances the level of pairing between the two X chromosomes during meiosis in females. B. It allows for the levels of expression of genes on the autosomes to be similar to the levels of genes on the X chromosome. C. It reduces the amount of nondisjunction during meiosis in females. D. It suppresses the expression of genes on the Y chromosome in males. E. It allows for the levels of expression of genes on the X chromosome to be similar in males and females.
Which of the following have identical DNA?
A. Siblings B. Mothers and children C. Identical twins D. Fraternal twins E. Both C & D