Pairs of genes that control the same trait are known as .

a)hybrids
b) loci
c) alleles
d) gametes

C) alleles

Explanation:

Alleles:Each of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

the correct option is option d