What is a gamet?
Gamete is a cell produced by an organism for sexual reproduction. In humans, eggs and sperm have two sex cells that differ in their size and in other qualities, such as the amount of everyone that produces the body. Each of these cells has 23 chromosomes, exactly half the number found in other cells of the body. They consist of a special cellular division called meiosis, which occurs only in primary genital organs - testicles and ovaries. Fertilization combines gametes of both parents into Zygota.
Sexual organisms create a special type of cell, a gamet that combines with another cell for reproduction. In humans, each contains one pair of 23 chromosomes, and therefore it is haploid, while other cells are diploid, with two pairs of chromosomes. 23. The couple varies in men and women and is what distinguishes both sexes biologically, with men having a few xy and women XX. Chromosomes consist of a long chain of genes tied together in the sequence. Since eggs or eggs, female buAll, can only carry X chromosomes, gender is determined by male gamete.
Normal cell division to create a new copy of the original is done by a process called mitosis. A slightly different division, Meiosis, creates a new gameter. Both processes include copying DNA from the nucleus of the parent cell and its transmission to a new one, but Meiosis includes a special combination of DNA from the original parents. This recomposure of hereditary information allows the diversity of inherited features in the newly produced gameter; That is why children have a mixture of genes from both parents.
Size and relative amount distinguishes males from female gametes. Male gametes, sperm, are movable, small and produced in large numbers, few of which will reach fertilization. Eggs, female cell, are large, with a cytoplasm that nourishes an embryo if fertilization occurs. Some types of eyelashes and plants do not have separate male and female gametes but reproduce a combination of GENetically identical cells. Asexual species do not produce any gamets and cells are divided only in the form of mitosis.
4 Each testicular cell, which is subject to meiosis, produces four new gametes. In women's ovaries, egg cells generate oogenesis, which is largely performed at birth, but which is completed after puberty during monthly ovarian cycles, when the eggs ripen and are ready for fertilization. At the moment of fertilization, gametes and zygot are formed. This cell has 46 chromosomes, with the same number contributing to each parent.