L> Meiosis Tutorialfunction nameit(window) self.name="main" var far = null; function movie() remote = window.open("", "Movie", "width=250,height=275,resizable=yes"); if (remote != null) if (remote.opener == null) remote.opener = self; remote.location.href = "meiosis1_movie.html" remote.focus() var remote = null; duty movie2() far = window.open("", "Movie", "width=250,height=275,resizable=yes"); if (remote != null) if (remote.opener == null) remote.opener = self; remote.location.href = "meiosis2_movie.html" remote.focus()

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The sirhenryjones-museums.org project > cell sirhenryjones-museums.org > Meiosis > Meiosis i & II

Meiosis TutorialMeiosis i & II What is meiosis I?In meiosis I, chromosomes in a diploid cabinet resegregate, developing four haploid daughter cells. That is this step in meiosis the generates genetic diversity.The phases that meiosis i & II Prophase i DNA replication precedes the start of meiosis I. Throughout prophase I, homologous chromosomes pairand form synapses, a step unique to meiosis. The combine chromosomes are dubbed bivalents, and also the formationof chiasmata brought about by hereditary recombination i do not care apparent. Chromosomal condensation allows these come be viewed in the microscope. Note that the bivalent has actually two chromosomes and also four chromatids, v one chromosome comes from each parent. Prometaphase i The atom membrane disappears. One kinetochore creates per chromosome quite than one per chromatid, and the chromosomes attached to spindle fibers start to move. Metaphase i Bivalents, each written of two chromosomes (four chromatids) align at the metaphase plate. The orientationis random, v either parental homologue top top a side. This means that over there is a 50-50 possibility for the daughter cellsto obtain either the mother"s or father"s homologue for each chromosome. Anaphase ns Chiasmata separate. Chromosomes, each v two chromatids, relocate to different poles. Each of the daughter cell is currently haploid (23 chromosomes), but each chromosome has two chromatids. Telophase ns nuclear envelopes may reform, or the cabinet may conveniently start meiosis II. Cytokinesis Analogous come mitosis where two finish daughter cells form. Meiosis IAnimation(360 kb)Meiosis II Animation(360 kb)
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Meiosis II is comparable to mitosis. However, there is no "S" phase.


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The chromatids of every chromosome space no longeridentical due to the fact that of recombination. Meiosis II the end the chromatids producing two daughter cells each with 23 chromosomes (haploid), and each chromosome has actually only one chromatid.Previous | NextVocabulary The sirhenryjones-museums.org task > cabinet sirhenryjones-museums.org > Meiosis > Meiosis 1 & 2
The sirhenryjones-museums.org project department of Biochemistry and also Molecular Biophysics college of sirhenryjones-museums.org April 1997 Revised: august 2004 call the advancement Team