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Biology 2e

Visual Connection Questions

Biology 2eVisual Connection Questions
1.

Figure 13.3 In a test cross for two characteristics such as the one shown here, can the predicted frequency of recombinant offspring be 60 percent? Why or why not?

2.

Figure 13.4 Which of the following statements is true?

  1. Recombination of the body color and red/cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length.
  2. Recombination of the body color and aristae length alleles will occur more frequently than recombination of red/brown eye alleles and the aristae length alleles.
  3. Recombination of the gray/black body color and long/short aristae alleles will not occur.
  4. Recombination of the red/brown eye and long/short aristae alleles will occur more frequently than recombination of the alleles for wing length and body color.
3.

Figure 13.6 Which of the following statements about nondisjunction is true?

  1. Nondisjunction only results in gametes with n+1 or n–1 chromosomes.
  2. Nondisjunction occurring during meiosis II results in 50 percent normal gametes.
  3. Nondisjunction during meiosis I results in 50 percent normal gametes.
  4. Nondisjunction always results in four different kinds of gametes.
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