The flies with variegated eye color had what abnormal chromosome structure?
A) X-chromosome inversion that moves the w+ gene to a different orientation on the chromosome in some cells following X-ray exposure
B) X-chromosome translocation that moves the w+ gene to a region of heterochromatin on another chromosome in some cells following X-ray exposure
C) a mutation in the w+ gene following X-ray exposure that causes the gene to be overexpressed in a tissue-specific manner
D) X-chromosome deletion that deleted the w+ gene in some cells following X-ray exposure
E) a mutation in a somatic chromosome that causes the w+ gene to be translocated to the
X-chromosomes following X-ray exposure
A
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What would be the predicted outcome for a person having eyes that lack a lens but are otherwise fully
functional?
a. They would be totally blind. b. They would be able to perceive light and even respond to different light intensities, but that is all. c. They would be able to perceive light and even colors (solid color over a large area), but not details. d. They would be able to see some details and read print, but only if the text were written in large, black letters. e. They would have normal vision if given glasses.
When one muscle group is stimulated, no nervous signals are sent to the opposing group. This is the
result of a. reciprocal innervation. b. lack of innervation. c. hyperreflexia. d. compensation. e. depolarization.
The function of the rugae of the stomach is to:
a. secrete amylase. b. crush the food. c. increase the holding capacity of the stomach. d. mix the food with gastric juices. e. increase the surface area for secretion
What happens when a protein denatures?
a. Its primary structure is disrupted. b. Its secondary and tertiary structures are disrupted. c. It becomes irreversibly insoluble and precipitates. d. It hydrolyzes into component amino acids. e. Its hydrogen bonds, ionic bonds, hydrophobic interactions, disulfide bridges, and peptide bonds are disrupted.