DNA is a double helix, with a structure much like a twisted ladder. What forms the "rungs" of the ladder?
What will be an ideal response?
nightrogenous bases
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In the United States, individuals become infected with Vibrio cholerae most commonly by
A) consuming contaminated shellfish. B) drinking contaminated water. C) eating contaminated vegetables. D) person-to-person contact.
In the early 1900s, determining the chemical basis of heredity was difficult because chromosomes are composed of:
A. DNA. B. RNA. C. protein. D. DNA and protein. E. DNA, RNA, and protein.
A mutation that adds one or two bases to a gene disrupts the
A) replicating frame. B) intron index. C) genetic code. D) reading frame.
How is Newton Morton's statistical method helpful for calculating the overall probability of genetic linkage when allelic phase is unknown?
What will be an ideal response?