Give three ways meiosis produces genetic variation.
Crossingover during meiosis I
Independentsegregation
Random fertilisation of haploid gametes
What is independent segregation?
The random lining up of the maternal and paternal chromosomes on the equator of the cell during meiosis. This leads to new combinations of alleles in the gametes.
Does independent segregation happen time gametes are produced?
Yes
What is crossing over?
In prophase I, chromatids from homologous chromosomes wrap and twist around each other. Portions of the chromosomes breakoff and re-join the chromatid of the homologous partner. This leads to a new combination of alleles.
Does crossing over happen every time gametes are produced?
