What does the nonrecombining region of the Y contain?
A) the genes that have homologues on the X chromosome
B) SRY
C) the centromere
D) A, B, and C
E) B and C
Answer: E
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Which of the following is often associated with poultry products?
A. Salmonella B. Campylobacter C. Pseudomonas D. Lactobacillus E. Salmonella AND Campylobacter
What is the key difference between incomplete dominance and codominance?
a. In incomplete dominance, the recessive allele cannot be detected; in codominance, the expression of the recessive allele is apparent. b. In incomplete dominance, it is possible to detect the expression of a recessive allele; in codominance, both alleles contribute equally to the phenotype. c. In codominance, it is possible to detect the expression of a recessive allele; in incomplete dominance, both alleles contribute equally to the phenotype. d. In incomplete dominance, it is possible to detect the expression of the dominant allele; in codominance, two different genes contribute to a single phenotype. e. The two terms are synonymous.
What sirenian went extinct just 27 years after its discovery?
a. Brazilian manatee b. African manatee c. Stellar sea cow d. Dugong
HeLa cells have been used in research to
a. identify viral strains. b. investigate cancer. c. study the effects of radiation on cells. d. develop tissue culture techniques that produced a polio vaccine. e. all of these.