2007-01-07 08:48:47 · 3 answers · asked by Caroline O 3 in Science & Mathematics ➔ Biology
Fertilization is not part of meiosis.
Crossing over and random assortment contribute to genetic variability.
2007-01-07 14:58:24 · answer #1 · answered by floundering penguins 5 · 0⤊ 0⤋
in scientific words ameliorations are obesrved employing random distribution and crossing over which happens for the size of meiosis I. This finally finally ends up in genetic variability. This genetic variability is "very fairly much in all circumstances" for version with the enviroment..... Alsp this happens to maintain organic and organic and organic and organic forte of someone.
2016-11-27 02:25:36 · answer #2 · answered by trif 4 · 0⤊ 0⤋
- crossing over of chromosomes during prophase 1 of meiosis = segments of chromosomes are exchanged when the chromosomes condense.
- random fertilization: any egg can combine with any sperm to form a zygote. Each gamete has a unique combination of genes also; so every zygote is unique.
- Independant assortment: occurs in metaphase 1 of meiosis when the 2 homologous chromosomes line up on the equator, they can line up in any orientation and since each bivalent is made up of a chromosome from each parent, when they separate, you get a unique combination of chromosomes from each parent.
I hope this answers your question!
2007-01-07 09:06:03 · answer #3 · answered by Anonymous · 1⤊ 1⤋