In Drosophila melanogaster, the gene for eye color is located on the X chromosome. The allele for red eye color
(Xw+) is dominant over the allele for white eye color (Xw). You examine a vial of 100 flies that are all offspring from a
single genetic cross. You see only red-eyed females present, but you see both red-eyed and white-eyed males present. The
genotypes of the parents were ____.
a. Xw+Xw+; Xw+Y
b. XwXw; Xw+Y
c. Xw+Xw; XwY
d. Xw+Xw; Xw+Y
e. XwXw; XwY
ANSWER: d
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A) preemptive competition. B) consumption competition. C) overgrowth competition. D) territorial competition.
The Carboniferous Period is extremely significant to our current society because
A. mammals diversified. B. human evolution began in the period. C. plants and animals first adapted to a terrestrial environment during this period. D. the Carboniferous forests turned into the coal that fuels modern society.
A systematist includes a lizard in a phylogenetic analysis of relationships among bird families. In this analysis, the lizard would be treated as
A) the ingroup. B) the outgroup. C) a monophyletic group.
How many carbon dioxide molecules are produced by the complete aerobic breakdown of one glucose molecule?
A. 2 B. 3 C. 4 D. 5 E. 6