Sexual reproduction is the union of male and female gametes to form a fertilized egg, or zygote. The resulting offspring inherit one half of their traits from each parent. Consequently they are not genetically identical to either parent or siblings, except in the case of identical twins.
Mitosis and meiosis both involve cells dividing to make new cells. This makes them both vital processes for the existence of living things that reproduce sexually. Meiosis makes the cells needed for sexual reproduction to occur, and mitosis replicates non-sex cells needed for growth and development.
In biology, meiosis is the process by which one diploid eukaryotic cell divides to generate four haploid cells often called gametes. Meiosis is essential for sexual reproduction and therefore occurs in all eukaryotes including single-celled organisms that reproduce sexually. A few eukaryotes, notably the Bdelloid rotifers, have lost the ability to carry out meiosis and have acquired the ability to reproduce by parthenogenesis.
Skip navigation. Meiosis, the process by which sexually reproducing organisms generate gametes sex cellsis an essential precondition for the normal formation of the embryo. As sexually-reproducing, diploid, multicellular eukaryotes, humans rely on meiosis to serve a number of important functions, including the promotion of genetic diversity and the creation of proper conditions for reproductive success.
Sexual reproduction is a type of life cycle where generations alternate between cells with a single set of chromosomes haploid and cells with a double set of chromosomes diploid. Diploid cells divide into haploid cells in a process called meiosis. Two haploid cells combine into one diploid cell in a process called fertilisation.
Meiosis is the nuclear division of diploid cells into haploid cells, which is a necessary step in sexual reproduction. The ability to reproduce in kind is a basic characteristic of all living things. In kind means that the offspring of any organism closely resemble their parent or parents.
Mitosis is one cell dividing its nucleus and DNA into two cells that have the same amount of DNA as the original cell. Meiosis is one cell dividing into four cells that each has half the amount of DNA that as in the original cell. The advantage of sexual reproduction is that it generates genetic diversity, which can make a population of organisms better able to survive harsh environmental conditions. Sexual reproduction is possible because of meiosis, which is the shuffling of genes within a cell before it divides into four sperm or eggs.
Children in a family resemble their parents and each other, but the children are never exactly the same unless they are identical twins. Each of the daughters in the painting inherited a unique combination of traits from the parents. In this concept, you will learn how this happens.
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