Genetic Recombination Quiz

Two genes, A and B, show a recombination frequency of 15%. What is the estimated map distance between them?

• 5 centiMorgans

• 15 centiMorgans

• 25 centiMorgans

• 35 centiMorgans

If the recombination frequency between two genes, C and D, is 30%, what can be inferred about the map distance between them?

• 10 centiMorgans

• 30 centiMorgans

• Less than 30 centiMorgans due to underestimated distance

• Greater than 30 centiMorgans due to multiple crossovers

In a cross between two genes, X and Y, you observe 18 recombinants out of 100 offspring. What is the recombination frequency and map distance between the two genes?

• 10% and 10 centiMorgans

• 18% and 18 centiMorgans

• 36% and 36 centiMorgans

• 50% and 50 centiMorgans

A genetic cross results in a recombination frequency of 8% between genes E and F. If another gene G shows a recombination frequency of 4% with gene E, which gene is most likely closest to E on the chromosome?

• Gene E

• Gene F

• Gene G

• Genes F and G are equidistant

If three genes, H, I, and J, are mapped on the same chromosome with the following recombination frequencies: H-I = 10%, I-J = 15%, and H-J = 5%, what is the correct order of these genes?

• H - I - J

• I - H - J

• H - J - I

• J - H - I