COMPREHENSION QUESTIONS

Section 5.1

Question 1

1.What does the term recombination mean? What are two causes of recombination?

Section 5.2

Question 2

2.What effect does crossing over have on linkage?

Question 3

3.Why is the frequency of recombinant gametes always half the frequency of crossing over?

Question 4

4.What is the difference between genes in coupling configuration and genes in repulsion? How does the arrangement of linked genes (whether they are in coupling or repulsion) affect the results of a genetic cross?

Question 5

5.What is the difference between a genetic map and a physical map?

Section 5.3

Question 6

6.Explain how to determine, using the numbers of progeny from a three-point cross, which of three linked loci is the middle locus.

Question 7

7.What does the interference tell us about the effect of one crossover on another?

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