The host states that it is easier to identify genes that cause illness in families. In order to do this they studied people in .

A. Iceland

B. India

C. America

A. Iceland

Explanation:

Island is an island and it may lead to high rates of endogamy due to the availability of mates. Endogamy is the practice of having sexual relations only within a small group (in this case, the small group is represented by people living in the island). Endogamy is a reproductive behavior that is associated with the likelihood suffer genetic disorders because the recessive alleles are exposed to selection

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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."