Tuesday, January 28, 2014

Determining a childs sex

Determining Sex: What determines a childs conjure? Usually it is the enkindle chromosomes in which two X chromosomes in the nucleus of its schoolmaster junkie cell and it bequeath become a feminine; a Y and an X chromosome and it allow become a masculine. An junky will have at least wholeness female determining X chromosome. A spermatozoonatozoan cell, however, whitethorn birth either an X chromosome or a Y chromosome. If the fertilizing sperm cell contains an X chromosome, the egg will weaken into a female. If it contains a Y chromosome, it will snap off into a male. Nonetheless, it is assertable for an XY to become female. If the Y chromosome is missing the SRY gene, which is located dainty the suppress of the short branch of the chromosome, the egg will develop into a female. At three weeks of fetal development, there is no augury of gonads. By the fifth week, venereal ridges have begun to pull in near the kidneys. These ridges (gonads) will trans form into either ovaries or testes. Until the ordinal week, the genital ridge is similar in both males and females. original rootage cells, which will later become either sperm or eggs cells, migrate from the embryos yolk sac to the genital ridge. These seminal fluid cells are integrated into the primitive sex chord, which are fingerlike projections that have formed over the previous(prenominal) week. Male development: Sex is lead determined the last half of the sixth week. If the Y chromosome is drive home in the embryos cells, a gene within the short arm of the chromosome called SRY will turn on, initiating a chemical chain reaction that will turn on other genes and stimulate the return of male hormones. If the X chromosome is present, or if the SRY gene is missing from the Y chromosome, If you fate to get a full essay, order it on our website: OrderCustomPaper.com

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