The oldest plant community in Glacier Bay is hemlock-spruce forest. You would predict that hemlock and spruce trees are _____-selected species
A. r
B. K
B
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ASO probes are used for the molecular testing of
A) chromosomal rearrangements. B) single nucleotide changes in a DNA region. C) RFLP fragments in a DNA region. D) defective proteins implicated in disease. E) successfully cloned Ti plasmids.
Calico cats are never male because:a
recessive genes are not usually expressed on their X chromosome. b. male hormones prevent expression of the calico phenotype. c. two different X chromosomes are needed for the expression of the calico phenotype. d. two different Y chromosomes are needed for the expression of the calico phenotype. e. one X chromosome and one Y chromosome are needed for the expression of the calico phenotype.
In Tay-Sachs disease, individuals inherit genes with a mutation that causes an inability to produce ______________ in their lysosomes.
A) mRNA B) tRNA C) rRNA D) a lipid-digesting enzyme E) aldehyde dehydrogenase
Which virus may play a role in multiple sclerosis?
A. Cytomegalovirus (CMV) B. Epstein Barr Virus C. Herpes simplex virus-2 D. Smallpox E. Human herpesvirus 6 (HHV-6)