Question

Cell division in in gametogenesis is not same in different organism why

Answer 1

In haploid organsisms gametes form by mitosis and diploid organsisms do meiosis for formation of gametes , in haploid organsisms meiosis happens to maintain haplontic life cycle it does meiosis after fertilisation

Answer 2

cell division in gametogensis is not same in different organism because ,

cell division occur in two base :

1) haploid

2) diploid

* Haploid -- Haploid describes a cell that contains a single set of chromosomes. The term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes. In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diplod cells. The number of chromosomes in a single set is represented as n, which is also called the haploid number. In humans, n = 23.

Gametes contain half the chromosomes contained in normal diploid cells of the body, which are also known as somatic cells. Haploid gametes are produced during meiosis, which is a type of cell division that reduces the number of chromosomes in a parent diploid cell by half. Some organisms, like algae, have haploid portions of their life cycle. Other organisms, like male ants, live as haploid organisms throughout their life cycle.

* Diploid -- A diploid cell is a cell that contains two sets of chromosomes. This is double the haploid chromosome number. Each pair of chromosomes in a diploid cell is considered to be one homologous chromosome set. A single chromosome set consists of two chromosomes, one of which is donated from the mother and the other from the father. Humans have 23 sets of homologous chromosomes. Paired sex chromosomesare the (X and Y) homologues in males and the (X and X) homologues in females.

The somatic cells in your body are diploid cells. Somatic cells include all of the cell types of the body, except for the gametes or sex cells. Gametes are haploid cells. During sexual reproduction, gametes (sperm and egg cells) fuse at fertilization to form a diploid zygote. The zygote develops into a diploid organism.

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