Recombination

Question 1

What is the result of double crossover on test crosses?

Answer 1

They can make alleles end up on the same original chromosome resulting in them look like they are not linked

Question 2

What is a three point test cross?

Answer 2

Order of 3 genes is established in a single set of progeny.

Question 3

Why are three-point test crosses conducted?

Answer 3

This method allows for double crossovers to be detected and provides more accurate map distances.

Question 4

How close is recombination percentage to the actual physical distance?

Answer 4

Recombination percentage underestimates map distance after 20%