In the fruit fly, Drosophila melanogaster, a spineless (no wing bristles) female fly is mated to a male that is claret (dark eyes) and hairless (no thoracic bristles). Phenotypically wild-type F1 female progeny were mated to fully homozygous (mutant)
males, and the following progeny (1000 total) were observed:
Phenotypes Number Observed
spineless 321
wild 38
claret, spineless 130
claret 18
claret, hairless 309
hairless, claret, spineless 32
hairless 140
hairless, spineless 12
What is the gene order?
A) hairless, spineless, claret
B) claret, spineless, hairless
C) spineless, claret, hairless
D) it is impossible to tell
E) claret, hairless, spineless
Answer: E
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In a simple laboratory experiment, a researcher maintained two different species of single celled protists, Paramecium caudatum and Paramecium aurelia
He recorded population growth of each species individually and then mixed a similar number of individuals from each population and recorded their growth rates when living together. The graphs below represent the results of this experiment.
Which of the following antibacterial drug groups does not target protein synthesis?
A. Tetracyclines B. Aminoglycosides C. Oxazolidinones D. Sulfonamides E. Macrolides
Small, membrane-bound sac that stores substances within a cell.
What will be an ideal response?
Name and describe three organelles that are common to animal and plant cells
What will be an ideal response?