Human chromosome 3 is classified as a(n)
a. sex chromosome.
b. sister chromatid.
c. autosome.
Answer: c. autosome.
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A male fruit fly has the genotype PpYYrrTt. In terms of these 4 allele pairs, how many different types of gametes can he form?
A. 2 B. 4 C. 8 D. 16 Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about alleles and gametes? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Biosafety Level 2 agents:
a. include those that are the common agents of infectious disease. b. require only standard good laboratory technique. c. include M. tuberculosis, M. gordonae, and Brucella. d. require the use of maximum containment facilities.
When cichlids were present, what was the main selection factor affecting the average number of spots on male guppies?
a. natural selection for a reduction in spot number in order to avoid predation b. natural selection for an increase in spot number to enhance camouflage ability c. natural selection for a reduction in spot number to enhance attractiveness tofemales d. natural selection for an increase in spot number to enhance attractiveness tofemales
Which of the chromosomes in the image at right are identical to one another before Meiosis I?
1.sister chromatids A and B only
2.sister chromatids C and D only
3.sister chromatids A and C only
4.homologues in image E
5.separated sister chromatids in image F
6.both sister chromatids A/B and C/D