![]() During the egg donation process, egg donors donate their eggs cells for these to. As the embryo develops, the cells begin to differentiate. The egg cell, o ovum (plural ova), is the female reproductive cell, or gamete. The zygote grows by mitosis to form an embryo. In this way, sexual reproduction introduces variation into a species. It has DNA from both the mother and the father so will have a mixture of characteristics from both parents. Through the process of fertilization, egg and sperm join to. Thats half as many chromosomes as regular cells. It is diploid as it has two copies of every chromosome - one came from the sperm cell and one came from the egg cell. Egg and sperm cells have just 23 chromosomes each. The maternal chromosomes from the egg cell and the paternal chromosomes from the sperm cell pair up. When egg and sperm cells combine in fertilisation, they merge the two sets of chromosomes, ending up with 46 chromosomes in total. The 23 chromosomes within a gamete are referred to as a haploid. In humans, each gamete has half the number of the total 46 chromosomes that the body requires. Fertilisation in humansįertilisation is the fusion of the nucleus of a male gamete with the nucleus of a female gamete. This process results in variation as it involves the mixing of genetic information. The offspring produced in sexual reproduction are genetically different to each other and the parents.
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