A codon Question 6 options: corresponds to a particular amino acid. consists of four nucleotides. consists of discrete amino acid regions. catalyzes RNA synthesis.

corresponds to a particular amino acid

Explanation:

All living organisms/cells consists of DNA, which encodes or stores genetic information. The DNA is made up of nucleotide bases, whose order determines the order of the nucleotides in the transcript mRNA. The mRNA is read in a group of three nucleotide sequences called CODON. Each codon specifies an amino acid i.e. codes for a specific amino acid in the genetic code.

There are about 64 possible codons made from 4 nucleotides that are read three at a time i.e. 4^3=64.

a community that experiences major changes undergoes progress

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."