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meiosis
vocabulary
Term | Definition |
---|---|
Gamete(s); | reproductive/sex cells ( eggs and sperm) |
Haploid; | the number of chromosomes in a sex cell (2n) |
Oogenesis; | production of eggs. |
Ovum/ova; | the female reproductive cell ( egg ) . |
Sperm; | the male reproductive cell. |
Zygote; | is a fertilize egg. |
Tetrad; | is a group of four chromatids. |
Synapsis; | centromere where each chromosome lines up with its homologous pair and become attached. |
Fertilization; | union of an egg and sperm. |
Disjunction; | separation of homologous chromosomes. |
Gametogenesis | production of the gametes |
Homologous chromosome; | chromosomes that are paired one from each parent, and that are similar in lenght, gene position and centromere location. |
Crossing over; | process in genetics by which the two chromosomes of a homologous pair exchange equal segments with each other. |
Gonads; | reproductive organs ( ovaries and testes) |
Spermatogenesis; | production of sperm |
Polar Bodies; | small haploid cell that is formed as an egg cell during oogenesis , but it doesn´t have the ability to be fertilized. |
Meiosis; | reduction division, cell division in diploid cells resulting in Haploid cells. |
Variation | is the difference between cells. |
Nondisjunction; | chromosomes don´t divide. |