Questions: Based on the below image, which of the following statements is true? A. Recombination of the body color and re/cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length. B. Recombination of the body color and aristae length will occur more frequently than recombination of red/brown eye alleles and aristae length alleles. C. Recombination of the gray/black body color and long/short aristae alleles will not occur. D. 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.

Based on the below image, which of the following statements is true? A. Recombination of the body color and re/cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length. B. Recombination of the body color and aristae length will occur more frequently than recombination of red/brown eye alleles and aristae length alleles. C. Recombination of the gray/black body color and long/short aristae alleles will not occur. D. 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.
Transcript text: Based on the below image, which of the following statements is true? A. Recombination of the body color and re/cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length. B. Recombination of the body color and aristae length will occur more frequently than recombination of red/brown eye alleles and aristae length alleles. C. Recombination of the gray/black body color and long/short aristae alleles will not occur. D. 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.
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Solution

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The answer is A: Recombination of the body color and re/cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length.

Explanation for each option:

A. Recombination of the body color and re/cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length.

  • The recombination frequency between body color (48.5 cM) and cinnabar eyes (57.5 cM) is 57.5 - 48.5 = 9 cM. The recombination frequency between wing length (65.5 cM) and aristae length (0 cM) is 65.5 - 0 = 65.5 cM. Since 9 cM is less than 65.5 cM, this statement is incorrect.

B. Recombination of the body color and aristae length will occur more frequently than recombination of red/brown eye alleles and aristae length alleles.

  • The recombination frequency between body color (48.5 cM) and aristae length (0 cM) is 48.5 cM. The recombination frequency between red/brown eyes (104.5 cM) and aristae length (0 cM) is 104.5 cM. Since 48.5 cM is less than 104.5 cM, this statement is incorrect.

C. Recombination of the gray/black body color and long/short aristae alleles will not occur.

  • The recombination frequency between gray/black body color (48.5 cM) and long/short aristae (0 cM) is 48.5 cM, which indicates that recombination can occur. Therefore, this statement is incorrect.

D. 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.

  • The recombination frequency between red/brown eyes (104.5 cM) and long/short aristae (0 cM) is 104.5 cM. The recombination frequency between wing length (65.5 cM) and body color (48.5 cM) is 65.5 - 48.5 = 17 cM. Since 104.5 cM is greater than 17 cM, this statement is correct.

Therefore, the correct statement is D.

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