If two parent organisms have different alleles for a gene that an experimenter wants to test, he or she

will perform a
a. dihybrid cross.
b. monohybrid cross.
c. multiple allele cross.
d. trihybrid cross.
e. polyploid cross.


B

Biology & Microbiology

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a. is an enzyme. b. adds new nucleotides to a strand. c. proofreads DNA strands to see that they are correct. d. derives energy from free nucleotides for strand assembly. e. is all of these

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What is the purpose of DNA supercoiling?

What will be an ideal response?

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The plants and animals now present on acreage from which the trees were removed ten years earlier

represent a. primary succession. b. a climax forest. c. pioneer species. d. secondary succession. e. species introductions.

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Which of the following hormone(s) is/are not synthesized from cholesterol?

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