Briefly explain the process of natural selection
What will be an ideal response?
ANS:
Answers will vary, but should include the following key components: Genetic mutations or changes to the DNA sequence arise continually and change the phenotype of organisms. Organisms possessing certain geno-typic characteristics that make them better adjusted to an environment tend to survive, reproduce, and there-fore increase in number within the population.
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Chaperones mediate nucleosome assembly. From the list below, what must happen first?
A. The CAF-1 chaperone binds an H3-H4 dimer and deposits it onto the DNA strand. B. H3 and H4 form heterotetramers. C. The NAP-1 chaperone assembles two H2A-H2B heterodimers with a H3-H4 tetramer. D. The CAF-1 chaperone binds an H2A-H2B dimer and deposits it onto the DNA strand.
CpG islands are associated with which of the following?
A. Nucleosome location B. DNA methylation C. Steroid hormone activity D. cAMP pathway
If an allele is dominant in one sex and recessive in another, it is an example of ___________
A. sex-limited inheritance B. sex-influenced inheritance C. incomplete dominance D. simple Mendelian inheritance
Do all animal samples have similar profiles?
a. Yes b. No