Meiosis - Wikipedia, the free encyclopedia
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In biology, meiosis (pronounced /maɪˈoʊsɨs/ ) is a process of reductional division in which the number of chromosomes per cell is cut in half. In animals, meiosis always results in the formati...
en.wikipedia.org/wiki/Meiosis
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Sex Chromosomes: ... The male gamete, called the spermatozoan, is relatively motile and usually has a flagellum. The female gamete, called the ovum, is nonmotile and relatively large in comparison to the male gamete. When the haploid male and female gametes unite in a process called fertilization, they form what is called...
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biology.about.com/od/basicgenetics/p/chromosgender.htm
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of the sex-determining chromosomes of a male must be XY and a female XX. In other words, due to the presence of the Y chromosome exclusively in the sperm, it is that gamete alone that can determine that an offspring will be a male. ... Typically many more sperm than eggs are created and wasted, in the sense of never...
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www.absoluteastronomy.com/topics/Gamete
www.absoluteastronomy.com/topics/Gamete
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Artificial insemination -- the placement of sperm into a female reproductive tract or the mixing of male and female gametes by other than natural means. Autosome -- a nuclear chromosome other than the X- and Y-chromosomes. ... Ovum; The female gamete; Monoecious; Organisms whose individuals produce both male and female gametes;
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en.mimi.hu/biology/gamete.html
en.mimi.hu/biology/gamete.html
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In humans an ovum can only carry X chromosome (of the X and Y chromosomes) where as a sperm can carry either an X or a Y, hence, it has been suggested that males have the control of the gender of any resulting zygote as the genotype of the sex-determining chromosomes of a male must be XY and a female XX. ... Gamete cycle...
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www.statemaster.com/encyclopedia/Gamete
www.statemaster.com/encyclopedia/Gamete
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Gametes or sex cells (eggs from female and sperm from male) have one chromosome from each autosome pair and one sex chromosome (one set of chromosomes), ... Therefore, in humans with 23 pairs of chromosomes, a gamete (egg or sperm) could have 223 or 8,388,604 possible combinations of chromosomes from that parent.
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biology.clc.uc.edu/Courses/bio104/meiosis.htm
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the apparent increase in the size of an object ... Large animals require more oxygen and nutrients than small animals. ... Air has a higher oxygen content than water, so gills were no longer necessary.
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faculty.uca.edu/~johnc/practice_questions_for_exam_2.ht...
faculty.uca.edu/~johnc/practice_questions_for_exam_2.htm
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Cell that functions in sexual reproduction by merging with another gamete to form a zygote. Examples of gametes include sperm and egg cells. In most organisms, the gametes are haploid (they contain half the number of chromosomes of the parent), ... Among the animals that are simultaneously male and female,
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encyclopedia.farlex.com/gamete
encyclopedia.farlex.com/gamete
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There are only 20 genes discovered so far on the human Y chromosome, far fewer than on all other human chromosomes. In humans, whether a person is male or female is determined by the particular combination of the two sex chromosomes in the body cells. ... If a Y carrying gamete from a male fertilizes a female gamete,
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encyclopedia.farlex.com/Y+chromosomes
encyclopedia.farlex.com/Y+chromosomes
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