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. Between fertilisation and meiosis there can be a large number of cell divisions without change of the number of chromosomes. Fertilisation creates a single-celled zygote which includes genetic material from both gametes. In a process called genetic recombination , genetic material DNA joins up so that homologous chromosome sequences are aligned with each other, and this is followed by exchange of genetic information.
Sexual Reproduction in Human Beings | Term Paper | Biology
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Collectively, these parts are called the vulva. Rich with nerves, the vulva can provide sexual pleasure when properly stimulated. The vagina is a muscular tube about three to four inches long that ends the birth canal. The vaginal opening is visible from the outside but it is protected by the labia when a woman stands and during most activities. The labia majora are two folds of skin that extend from the front of the vaginal opening to the back of it. The outer surfaces of the folds have darker-colored skin and stronger hairs, while the inner folds are smoother.
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(Hindi) Summary of Class 10 Biology: How do Organisms Reproduce?
Reproduction is the process by which organisms make more organisms like themselves. But even though the reproductive system is essential to keeping a species alive, unlike other body systems, it's not essential to keeping an individual alive. In the human reproductive process, two kinds of sex cells, or gametes GAH-meetz , are involved.
About Translations. Sexual reproduction in most species is regulated by regular endocrine changes, or cycles, in the female. These cycles begin postnatally, function for variable times and can then decrease or cease entirely. There are a number of different species-specific female hormonal cycles which can regulate reproduction.