How might genetic drift be important in a small population?
1. It increases genetic diversity by introducing alleles from one population into another.
2. It decreases genetic diversity only by reducing population size.
3. It decreases genetic diversity via sampling error during mating.
4. It increases genetic diversity by introducing new genes into the DNA of a species.

3. It decreases genetic diversity via sampling error during mating.

Explanation:

Genetic drift is important in small population because it decreases genetic diversity via sampling error during mating from generation to generation.

Genetic drift is defined as a change in the allele frequency of a population as a result of sampling error across different generations.

For a small population that already has low number of alleles, genetic drift leads to the fixation of alleles within the population, increases inbreeding coefficients and increases the chance of homozygosity within the population thereby reducing the overall genetic diversity of the population.

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."

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)