Gametes are produced by mitosis (not meiosis) and after fertilization a diploid zygote is created. The single zygote cell never grows or divides my mitosis. It can only divide by meiosis to produce haploid cells once more, which then produce the main adult body.
Are gametes produced by meiosis?
Gametes are haploid cells, and each cell carries only one copy of each chromosome. These reproductive cells are produced through a type of cell division called meiosis. … These cells develop into sperm or ova.
Are there gametes in mitosis?
Gene Transmission in Mitosis
Mitosis occurs in somatic cells; this means that it takes place in all types of cells that are not involved in the production of gametes.
What is meiosis 1 called?
As previously mentioned, the first round of nuclear division that occurs during the formation of gametes is called meiosis I. It is also known as the reduction division because it results in cells that have half the number of chromosomes as the parent cell.
Why are animals gametes haploid?
Animals are diploid organisms (2n) and undergo sexual reproduction. This sexual reproduction causes them to produce gametes via a process called MEIOSIS. … This means that meiotic division produces haploid gametes (n) from a diploid animal.
Why does mitosis happen?
Mitosis is a process where a single cell divides into two identical daughter cells (cell division). … The major purpose of mitosis is for growth and to replace worn out cells.