During meiosis 1 the 23 homologous chromosomes line up on the equator side by side arranged in a random order.Which chromosomes go to which daughter cell is a matter of chance.This random alignment of chromosomes leading to different combinations of paternal and maternal chromosomes in the daughter cells is called independent segregation.
Independent assortment of chromosomes in Meiosis 1 gives rise to variation.When the bivalents migrate to the equator and align on the metaphase plate they do do so in a random order.There are 23 pairs of chromosomes which can be arranged in 223 different ways.No two chromosomes are identical due to their origin.So when the chromosomes move apart in anaphase each cell is genetically different because it has a different combination of maternal and paternal chromosomes.
Independent assortment of chromosomes in Meiosis 1 gives rise to variation.When the bivalents migrate to the equator and align on the metaphase plate they do do so in a random order.There are 23 pairs of chromosomes which can be arranged in 223 different ways.No two chromosomes are identical due to their origin.So when the chromosomes move apart in anaphase each cell is genetically different because it has a different combination of maternal and paternal chromosomes.