The Hardy-Weinberg principle is useful because:a
it explains the existence of variation in populations.
b. it proves that Mendel was correct for populations.
c. it describes most populations.
d. it explains the existence of a large number of species.
e. it identifies those factors that can change allele or genotype frequencies.
E
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How could overlapping genes in a positive ssDNA virus genome be predicted?
A) Convert the positive ssDNA into its complementary ssDNA and search for genes in the negative ssDNA strand for sequences used in more than one predicted gene. B) Directly search the three frames of the positive ssDNA for genes that have sequences where more than one gene is predicted. C) Convert the positive ssDNA into negative ssDNA and search all six possible frames for genes that use part of the same sequence. D) Convert the positive ssDNA into its complementary ssDNA and search for genes in the negative ssDNA strand that also share a complementary gene in the positive strand.
A ____ consists of an ancestor and ALL its decendants.
A. Polyphyletic group B. Cladogram C. Monophyletic group D. Paraphyletic group
Which of the following events occurs directly after a DNA molecule is unzipped?
A.) Mismatched nucleotide bases are identified and replaced. B.) Free-floating nucleotides pair up with exposed bases. C.) Identical double-stranded DNA molecules are formed. D.) Enzymes break hydrogen bonds between base pairs.
The sperm head encloses a compact nucleus and is capped by a vesicle called what?
A. vas deferens B. acrosome C. epididymis D. Sertoli cell E. flagellum