A meiose i e precedida da interfase como ocorre com a mitose, onde o evento mais importante e a duplicacao do dna. Both processes start out after a cell goes through interphase and copies its dna exactly in the synthesis phase, or s phase. Mitosis video the cell cycle and mitosis khan academy. At this point, each chromosome is made up of sister chromatids held together by a centromere. Durant cette phase, une condensation des chromosomes a lieu figure 4. Flowers structure contains the plants reproductive organs, and its function is to produce seeds. This animation demonstrates the stages of mitosis in an animal cell. B1 les divisions cellulaires des eucaryotes pour repondre a. See more ideas about mitosis, teaching biology and biology classroom. Meiosis is a special type of nuclear division which segregates one copy of each homologous chromosome into each new gamete.
Click on any intermediate stage for example, anaphase, and see a representative still frame. Meiosis is the process whereby chromosomes are copied, paired up and separated to create eggs or sperm. Although mitosis and meiosis have very different results, the processes are similar, with just a few changes within the stages of each. Aug 19, 2019 organisms grow and reproduce through cell division. Na meiose, ocorre permuta entre cromossomos paternos e maternos. Ppt mitose e meiose powerpoint presentation free to. Divisions cellulaires et regulation i mitose et cycle. Pollen contains the male gametes, the female reproductive organ is the carpel, this contains an ovary with ovules, which contain female gametes. A partir dune cellule mere diploide, on obtient quatre cellules filles haploides au materiel. Divisions cellulaires et regulation i mitose et cycle cellulaire. Use the control buttons along the bottom to run the complete animation. Mitosis meiosis venn diagram mitosis vs meiosis side side co.
Download as ppt, pdf, txt or read online from scribd. Both processes involve the division of a diploid cell, or a cell containing two sets of chromosomes one chromosome donated from each parent. Mitose e meiose met fase 2 cromossomos localizados na placa equatorial da c lula. Meiosis, also, reduces the number of sets of chromosomes by half, so that when gametic recombination fertilization occurs the ploidy of the parents will be reestablished. Etapas da meiose meiose i basicamente as fases da meiose so parecidas com a da mitose.
These two nuclear division processes are similar but distinct. The pollen, male spores and ovules, female spores are produced in different organs, but the typical flower. Cromossomos homologos celula 2n duplicacao dos cromossomos cromossomos homologos duplos separacao dos homologos r. They allow for example large scale breeding of life stable colonies colony breeding. Aug 11, 2019 although mitosis and meiosis have very different results, the processes are similar, with just a few changes within the stages of each. Biologia citologia divisao celular mitose meiose gabarito. Now, as we exit mitosis, we get into cytokineses which will then split each of the nuclei into a separate cell when we split the cytoplasm right over here. Na profase i ocorre o crossingover ou permuta genetica. This animation i made for school that shows meoisis in a digital form.
Crossing over occurs between prophase 1 and metaphase 1 and is the process where homologous chromosomes pair up with each other and exchange different segments of their genetic material to form. Fases da mitose artigo divisao celular khan academy. Mitose gegen meiose im notizbuch meiosis mitosis notebook 8121961140357814. In eukaryotic cells, the production of new cells occurs as a result of mitosis and meiosis. Biology is brought to you with support from the amgen foundation. Nov 02, 2016 for the love of physics walter lewin may 16, 2011 duration. Nov 12, 2016 formation dune cellule cancereuse perturbation du genome, cancerisation et res. And if you wanna be precise, mitosis is the process by which this one nucleus will turn into two nuclei that each have the original genetic information.
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