How is the distinctive fur pattern of a calico cat produced?
a. by X-chromosome inactivation
b. by hormones
c. by Y-chromosome inactivation
d. by epistasis
Ans: a. by X-chromosome inactivation
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Identify the crustaceans in this group. Check all that apply.
_____ krill. _____ barnacles. _____ ostracods. _____ pill bugs. _____ horseshoe crabs.
Four of the five answers listed below pass through the atmosphere during their cycling. Select the exception
a. carbon b. oxygen c. nitrogen d. phosphorus e. water
All of the following are true of the process of
phosphorylation EXCEPT that a. a molecule gains a phosphate group. b. a molecule loses a phosphate group. c. molecules become less stable. d. it is used to prime molecules to react. e. it produces ADP from ATP.
The Punnett square is a useful tool for
A) determining the rate of segregation of alleles. B) calculating how many mutations occur during DNA replication. C) determining which genes or traits assort independently during gamete formation. D) predicting the ratios of possible genotypes of a particular combination of alleles. E) predicting the level of crossing over that will occur during meiosis.