A) 1
B) 2
C) 3
D) 4
E) 5

A) an individual's genotype for a particular trait.
B) a single base site in the genome that varies among individuals in a population.
C) a single copy of a gene.
D) a gene that is expressed differently in males and females.
E) the DNA base that begins a gene.

A) comprise the chromosomes.
B) use the information in specific DNA sequences to construct proteins.
C) use the information in specific proteins to construct DNA molecules.
D) entwine with DNA molecules to encode proteins.
E) form double helices that encode DNA sequences.