A transfer of genes between non-homologous chromosomes is known as
A. crossing over.
B. aneuploidy.
C. trisomy.
D. translocation.
E. duplication.
Answer: D
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Which of the following groups of people would be most comfortable at cooler temperatures?
A. calm people
B. quiet people
C. sedentary people
D. active people
Unlike all other amine derived hormones, thyroid hormones
A. bind to membrane receptors to elicit a response. B. activate second messengers via binding to a membrane receptor. C. are derived from cholesterol. D. are produced by the gonads. E. bind to intracellular receptors rather than to membrane-bound receptors to elicit a response.
Recognition sites of restriction enzymes are ________.
Fill in the blank(s) with the appropriate word(s).
Which process establishes the three primary cell layers?
1.cleavage 2.blastulation 3.fertilization 4.gastrulation