Drosophila melanogaster has four pairs of chromosomes (including a pair of sex chromosomes). Sperm from this species are formed by a meiotic process in which homologous chromosomes pair and segregate but do not undergo crossing-over. How many genetically different kinds of sperm could be produced by a Drosophila melanogaster male (XY)?

A) 4
B) 8
C) 16
D) 64
E) 256


C) 16

Biology & Microbiology

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Cells obtained from a Triplo-X woman would contain ________ Barr bodies

A) 0 B) 1 C) 2 D) 3 E) 4

Biology & Microbiology

During periods of stress or increased activity, the parasympathetic division of the autonomic nervous system predominates; during periods of rest, the sympathetic division of the autonomic nervous system predominates

Indicate whether the statement is true or false

Biology & Microbiology

If one strand is CCAATTG on DNA, then the complementary DNA strand is:

A. AAGGUUC B. CCAATTG C. GGTTAAC D. GGUUAAC

Biology & Microbiology

An aneurysm is a weakening of the walls of a blood vessel. Which of the following blood vessels would be most likely to break open if an aneurysm is present?

A) capillary B) venule C) artery D) lymph duct

Biology & Microbiology