(a) In a three-point mapping experiment, which three general classes of offspring are expected (assuming crossovers occur)? (b) How many different genotypic classes are expected?
What will be an ideal response?
(a) noncrossovers, single crossovers, double crossovers
(b) 8
Biology & Microbiology
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Which step occurs first during transcription?
a. Free RNA nucleotides are added to an RNA chain. b. RNA polymerase unwinds DNA. c. RNA polymerase attaches to the promoter site. d. The new RNA strand is released from RNA polymerase. e. The introns are removed from the RNA strand.
Biology & Microbiology
DNA Polymerase I
A. removes primers. B. adds bases to new DNA chain. C. proofreads DNA chain. D. seals DNA gaps.
Biology & Microbiology
Tiny filaments called ______ increase the surface area of a brush border cell
Fill in the blank(s) with correct word
Biology & Microbiology
The most toxic substances routinely found in the blood are metabolites of
1.carbohydrates. 2.proteins. 3.lipids. 4.minerals. 5.vitamins.
Biology & Microbiology