Due to a mutation in a smooth muscle gene, the blood vessels in the skin of a certain strain of mouse become dilated when temperature falls below a certain point. Based on the likely outcome of this mutation, what precautions should the researchers take to maintain the health of their mice?
A. The mice will be susceptible to high blood pressure, and should not be provided with exercise wheels.
B. The mouse room should be maintained at a cooler than normal temperature.
C. The mice will have weak muscles, and should be provided with exercise wheels.
D. The mouse room should be consistently maintained at a warm temperature.
Answer: D
You might also like to view...
If an embryo made testosterone normally but did not have testosterone receptors in any of its cells, would the embryo develop female reproductive structures, male reproductive structures, or no reproductive structures?
Indicate whether the statement is true or false
The human skeleton initially consists of just cartilage, which is replaced by bone, except in areas requiring flexibility. Made of highly resilient, molded cartilage tissue that consists primarily of water. Contains no blood vessels or nerves.
What will be an ideal response?
You have several hives of honey bees, Apis mellifera , that you keep in your backyard. Some bees uncap and remove dead larvae from cells, while others leave dead larvae in the cells; this difference is genetically determined. After a particularly hot summer in which many bees die from disease, you notice that the only hives remaining are the ones in which bees uncap and remove dead larvae. You have witnessed:
a) a population-level change in allele frequency. b) a population-level change in the frequency of a behavioral trait. c) evolution has not occurred, only bad weather. d) Only a) and c) are correct. e) a), b), and c) are all correct.
Why do cancer cells induced by DNA viruses preferentially carry copies of viral "early" gene fragments more than "late" genes?
a) Early genes encourage cell cycle arrest b) Early genes integrate into the host genome whereas late genes do not c) Early genes stay silent whereas late genes are actively expressed d) Early genes are responsible for encouraging cell cycle progression into S phase