A) Carriers of the sickle cell allele are resistant to developing Huntington disease.
B) Carriers of the sickle cell allele are resistant to malaria.
C) Carriers of the sickle cell allele are resistant to Tay-Sachs.
D) Carriers are more likely to live longer than non-carriers.
E) Carriers of the sickle cell allele are resistant to cystic fibrosis.

A) 20,000 people from the database of the National Institutes of Health in the U.S.
B) Close to 19,000 Venezuelans who lived in an isolated area.
C) The entire population of Venezuela.
D) Everybody with Huntington disease.
E) Only families with no history of Huntington disease.

A) The equation is useful for the analysis of multifactorial traits.
B) It is a test that can tell the difference between carriers of mutant alleles and those who do not have the allele at all.
C) The Hardy-Weinberg can be used to calculate how many identical twins there are in a population.
D) The Hardy-Weinberg equation can be used to estimate the carrier frequencies in populations.
E) It gives a clue to the function of a gene.