Which genes encode proteins that regulate the cell cycle in normal cells?
a. tumor suppressor genes
b. proto-oncogenes
c. oncogenes
d. tumor suppressor genes and proto-oncogenes
e. tumor suppressor genes, proto-oncogenes, and oncogenes
ANSWER: d
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The most abundant group of seedless tracheophyte plants are the
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Morphological divergence
a. is the change in body form from that of a common ancestor. b. is the change in body form to resemble that of an ancestor. c. is no change in body form over time. d. does not occur in related species. e. only occurs in unrelated species
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Axis development is determined by a MATERNAL EFFECT gene in Drosophila. A dominant Bicoid allele is required to set up the correct axis development in flies. bb (two loss of function alleles) is LETHAL in this MATERNAL EFFECT gene
A female Drosophila named Eustacia had all dead offspring. What is Eustacia's GENOTYPE? A) Bb or bb B) Bb C) bb D) BB or Bb E) BB