Meiosis (Crossing Over)

Question 1

Crossing over/ Recombination

Answer 1

Homologous pairs of chromosomes exchange sections of DNA for the same trait with non-sister chromatids, for example, eye colour and eye colour. This breaks up gene combinations that were inherited together.

Question 2

Each part of crossing over is called?

Answer 2

Chiasma

Question 3

Result of crossing over

Answer 3

Creates new combinations of alleles in the gametes not found in either parent (paternal or maternal).
This leads to an increase in the genetic diversity of gametes, increases genetic diversity in a population.
Creates new combinations of linked genes.

Crossing over causes each chromosome to have different genetic information, this means that the chromosomes will each have different alleles which will mean that they will code for different genotypes and phenotypes.

Question 4

When does crossing over happen

Answer 4

Prophase 1