Continuando com o tema anterior, pesquisei no YouTube um vídeo sobre núcleo e cromossomos. Pesquisei a palavra "nucleos", e nada achei relacionado. Coloquei "nucleos cell", nada também. Na última tentativa, coloquei a palavra "mitosis" e apareceu o vídeo abaixo. Velho, filmado em 8 mm, por isso, a imagem é preta a branca, entretanto a mitose propriamente dita é fantástica!
O ciclo de uma célular compreende duas etapas: intérfase e a mitose. E cada vez que a célula se divide, o material genético é duplicada de forma a dividi-lo em partes iguais entre as células filhas.
A fase M ou mitose é subdividida em prófase, metáfase, anáfase e telófase. No vídeo, o início da prófase e a parte final da telófase não aparecem.
A meiose é semelhante a mitose, porém reduz pela metade o número de cromossomos para formar os gametas da macho (espermatozóide) e da fêmea (ovócito).
Todo o ciclo celular é regulado por proteínas, que também regulam a progressão das várias fases do ciclo celular.
domingo, 25 de fevereiro de 2007
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Professor
Fiquei realmente curioso durante a aula para assistir ao video.
Cheguei em casa, assiti e achei muito interessante, pois até hoje eu só havia visto mitose através de livros e não imaginava que era tudo tão "vivo".
Um abraço e parabéns pelo conteúdo de seus blogs
Professor, muito interessante este vídeo. Sempre conheci os processos mitóticos pelos livros, mas nao tive a oportunidade de ver realmente acontecendo. Está de parabéns pelo conteúdo que está inserindo em seus blogs. Estarei sempre de olho. Valeu
Paulo Francisco Bizinotto (1º período veterinária)
Obrigado pessoal, pelo elogio.
Cláudio Yudi
Olá professor, tudo bem?
Espero que sim!
Estou passando para pedir apenas uma opinião...
Eu e meu colega colocamos uma pequena introdução sobre o que nós desejamos concluir com o blog de artrologia, gostaria que o senhor fosse lá e comentasse sobre o que você achou e se esta tudo ocorrendo como o planejado!
O endereço é:
www.artrologiauniube.weblogger.com.br
Ficamos gratos!
Izabella e Marcelo.
Oi professor, tubo bem?
Eu coloquei uma pequena introdução sobre o objetivo do Blog, gostaria que o senhor fosse lá e comentasse sobre o que você achou do blog, e deixar sugestões. O endereço do meu blog é www.artrovet.blogspot.com.
B-jos
Oi yudi..
Muito legal ver a mitose assim. Confesso que nunca tinha olhado no microscópio e adorei a aula pratica de terça.
Infelizmente nunca tive a curiosidade de procurar sobre isso no youtube, e nem imaginava tambem postavam coisas interressantes lá. Pra mim, era so besteirinha mesmo. Rs.
Hmm, o blog ta feito. falta ainda algumas informaçoes sobre a Fernanda, q é a minha parceira no blog, mas se você puder dar uma olhadinha e nos dizer a sua opinião.. :)
Fiz um primeiro post de introdução..
ate mais professor.
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www.carolinafaria.blogspot.com
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