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Biology question: How many chromosomes does the zygote have Following fertilization? Sperm contains 23 chromosomes. An egg contains 23 chromosomes. The zygote (a fertilized egg) contains 46 chromosomes. ... In: Biology [ Edit categories] ... Sperm contains 23 chromosomes. An egg contains 23 chromosomes. The zygote (a...
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wiki.answers.com/Q/How_many_chromosomes_does_the_zygote...
wiki.answers.com/Q/How_many_chromosomes_does_the_zygote_have_Following_fertilization
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What is the relationship between chromosomes and gender? Gender is determined by the presence or absence of certain chromosomes. ... Adult males lack a Y sex chromosome and have only an X chromosome. They produce sperm cells that contain either an X chromosome or no sex chromosome, which is designated as O. The females are...
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biology.about.com/od/basicgenetics/p/chromosgender.htm
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Before meiosis begins each chromosome in the pair has already doubled. ... Because each of the 23 pairs of chromosomes can line up in two different ways one person can produce more than 8 million (223) different kinds of eggs or sperm. When fertilization occurs, 223 x 223 or 70 trillion different zygotes are possible!
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www.contexo.info/DNA_Basics/Meiosis.htm
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Chromosomal characteristics of such embryos were investigated utilizing FISH. Studies using karyotypes have revealed that 1PN zygotes can represent ...
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humrep.oxfordjournals.org/cgi/reprint/10/1/132.pdf
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The incidence of chromosome anomalies was studied in fertilized oocytes in two groups of hybrid mice in which superovulation was induced by gonadotrophins and growth hormone-releasing factor (GRF) supplementation or gonadotrophins alone (controls).
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humrep.oxfordjournals.org/cgi/content/short/7/10/1394
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In contrast, attempts at somatic cell nuclear transfer into fertilized interphase zygotes have failed. As a result, it has generally been assumed that unfertilized human oocytes will be required for the generation of tailored human embryonic stem cell lines from patients by somatic cell nuclear transfer.
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www.nature.com/nature/journal/v447/n7145/full/nature058...
www.nature.com/nature/journal/v447/n7145/full/nature05879.html
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A simple technique for making chromosome preparations from zygotes and early blastocysts is described. The morphological features of blastocysts and total ...
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www.springerlink.com/index/0415115800NT4227.pdf
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Dyban and Sorokin, 1983 ). Similarly, male and female pronuclei respond differently to premature chromosome condensation induced by fusion of mouse zygotes with MII oocytes, ... These observations suggest an essential role of AKAP95 in the condensation of maternal chromosome in mitotic zygotes.
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jcs.biologists.org/cgi/content/full/115/14/2931
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A-kinase anchoring protein AKAP95 is implicated in somatic mitotic chromosome condensation by recruiting the condensin complex. Here, we report a differential regulation of condensation of maternal and paternal chromosomes mediated by AKAP95 in mitotic mouse zygotes.
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jcs.biologists.org/cgi/content/abstract/115/14/2931
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