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.

Biology & Microbiology

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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.

Biology & Microbiology

CpG islands are associated with which of the following?

A. Nucleosome location B. DNA methylation C. Steroid hormone activity D. cAMP pathway

Biology & Microbiology

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

Biology & Microbiology

Do all animal samples have similar profiles?

a. Yes b. No

Biology & Microbiology