crossing over

Question 1

When does crossing over happen

Answer 1

The chromosomes of a homologous pair are arranged down the middle of the cell before the first cell division in meiosis I.

Question 2

crossing over is

Answer 2

The process whereby a chromatid breaks during meiosis and rejoins to the chromatid of its homologous chromosome so that its alleles are exchanged

Question 3

What happens during crossing over

Answer 3

Sections of DNA are swapped between the chromosomes in a pair in a process called crossing over.

Crossing over produces new combinations of alleles.