Do gametes have more chromosomes?
Unlike the body’s other cells, the cells in the egg and sperm — called gametes or sex cells — possess only one chromosome. Gametes are produced by meiosis cell division, which results in the divided cells having half the number of chromosomes as the parent, or progenitor, cells.
Are gametes formed through mitosis?
Gametes are produced by mitosis (not meiosis) and after fertilization a diploid zygote is created. … It can only divide by meiosis to produce haploid cells once more, which then produce the main adult body.
What is the difference between gametes and all other body cells?
What is the difference between body cells and gametes (sex cells)? Body cells make up the body of the organism, while gametes are sex cells that could be either a sperm or an egg cell.
How does the number of chromosomes in gametes differ?
Human somatic cells have 46 chromosomes, and since a gamete can be thought of as half a somatic cell, they have 23 each.
Why do gametes only have 23 chromosomes?
Fertilisation. Gametes have half the total number of chromosomes that the organism needs to develop and are referred to as haploid . For example, humans need 46 chromosomes to develop, therefore a human gamete has 23 chromosomes.
Are gametes haploid or diploid?
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.
Why are gametes genetically different?
Genetic variation is increased by meiosis
During fertilisation, 1 gamete from each parent combines to form a zygote. Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote.