Which of the following statements regarding human genetic disorders is accurate?
a. disorders in individual genes can cause disease or provide individuals with a genetic advantage.
b. nondisjunction can lead to an incorrect number of sex chromosomes.
c. nondisjunction is responsible for causing huntington's disease.
d. disorders in individual genes are responsible for down's syndrome.

Suppose that on a small island off the coast of scotland, 32 percent of the population has blue eyes, which means that these individuals must be homozygous for the blue eye color gene (bb). the only other eye color found on the island is brown, and individuals that are homozygous for the brown eye color gene (bb) or heterozygous (bb) will have brown eyes because brown is the dominant gene. assume this population is in hardy-weinberg equilibrium. if 100 babies are born next year, how many of these would you expect to have brown eyes and be heterozygous? a. 58 b. 49 c. 29 d. 43

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