| A | B |
|---|
| Chromosomes | contain genetic information - 23 pairs in humans |
| Homologues | 2 members of each chromosomes that carries the same genetic information |
| diploid | cell having a complete set of chromosomes |
| haploid | cell having half a set of chromosomes |
| n | haploid - half a set of chromosomes |
| 2n | diploid having a complete set of chromosomes |
| gametes | sex cells - haploids - n |
| zygote | fertilized egg - 2n - getting half of the chromosome from each parent |
| sexual reproduction | Combination of egg (n) and sperm (n) to create a zygote (2n) |
| meiosis | 2n → n, Diploid to Haploid –creating gametes - |
| tetrad | 4 chromotids/ two chromosomes |
| prophase meiosis | crossing over happens here |
| end of meiosis | 4 haploid cells that are all different |
| end of mitosis | two diploid cells that are exactly the same |
| where meiosis | sex cells only |
| zygote | fertlized egg to 3 months |
| embryo | 3 to 6 months old |
| fetus | 6 to birth |
| crossing over | exchange of genetic material happens in prophase |
