求真百科歡迎當事人提供第一手真實資料,洗刷冤屈,終結網路霸凌。

變更

前往: 導覽搜尋

分裂生殖

大小無變化, 2 年前
無編輯摘要
*意 义:无性繁殖方式之一
{| class="https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%88%86%E8%A3%82%E7%94%9F%E6%AE%96&step_word=&hs=0&pn=67&spn=0&di=7146857200093233153&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=1025786188%2C4130356108&os=3025104899%2C916954962&simid=3435674229%2C82294065&adpicid=0&lpn=0&ln=831&fr=&fmq=1667047191506_R&fm=detail&ic=0&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fbkimg.cdn.bcebos.com%2Fpic%2F8c1001e93901213f0446cc5f5ee736d12f2e9538%26refer%3Dhttp%3A%2F%2Fbkimg.cdn.bcebos.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Dauto%3Fsec%3D1669639285%26t%3Db5d02de1de7d519c3defedd471de2bf4&fromurl=ippr_z2C%24qAzdH3FAzdH3Fkwthj_z%26e3Bkwt17_z%26e3Bv54AzdH3Ftpj4AzdH3F%25Eb%25An%25bd%25Em%25AE%25lmAzdH3F0amnal&gsm=3c0000000000003c&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined" style="float:right; margin: -10px 0px 10px 20px; text-align:left"|<center>'''分裂生殖'''<br><imgsrc="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fbkimg.cdn.bcebos.com%2Fpic%2F8c1001e93901213f0446cc5f5ee736d12f2e9538&refer=http%3A%2F%2Fbkimg.cdn.bcebos.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1669639285&t=b5d02de1de7d519c3defedd471de2bf4" width="280"></center><small> 圖片來自百度</small> |}
==简介==
分裂生殖(fission)无性繁殖方式之一。单细胞的生物通过[[细胞分裂]](横裂或纵裂)形成两个与母体一样的子体如细菌(横裂)、眼虫(纵裂)等,群体类生物的[[分裂生殖]]是群体中每个细胞同时进行分裂,进一步发育成和母体相同的新群体,如[[盘藻]]、[[实球藻]]等。
这种方式最典型的代表就是[[草履虫]],草履虫属原生动物纤毛虫纲,细胞内有大小两种类型的核,即大核和小核,小核是生殖核,[[大核]]是[[营养核]],在草履虫进行[[无性繁殖]]时,小核进行[[核内有丝分裂]],大核则行[[无丝分裂]],接着虫体从中部横缢分成2个新个体。
{| class="https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%88%86%E8%A3%82%E7%94%9F%E6%AE%96&step_word=&hs=0&pn=67&spn=0&di=7146857200093233153&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=1025786188%2C4130356108&os=3025104899%2C916954962&simid=3435674229%2C82294065&adpicid=0&lpn=0&ln=831&fr=&fmq=1667047191506_R&fm=detail&ic=0&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fbkimg.cdn.bcebos.com%2Fpic%2F8c1001e93901213f0446cc5f5ee736d12f2e9538%26refer%3Dhttp%3A%2F%2Fbkimg.cdn.bcebos.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Dauto%3Fsec%3D1669639285%26t%3Db5d02de1de7d519c3defedd471de2bf4&fromurl=ippr_z2C%24qAzdH3FAzdH3Fkwthj_z%26e3Bkwt17_z%26e3Bv54AzdH3Ftpj4AzdH3F%25Eb%25An%25bd%25Em%25AE%25lmAzdH3F0amnal&gsm=3c0000000000003c&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined" style="float:right; margin: -10px 0px 10px 20px; text-align:left"|<center>'''分裂生殖'''<br><imgsrc="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fbkimg.cdn.bcebos.com%2Fpic%2F8c1001e93901213f0446cc5f5ee736d12f2e9538&refer=http%3A%2F%2Fbkimg.cdn.bcebos.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1669639285&t=b5d02de1de7d519c3defedd471de2bf4" width="280"></center><small> 圖片來自百度</small> |}
==无丝分裂==
无丝分裂又称[[直接分裂]],是一种最简单的细胞分裂方式。整个分裂过程中不经历[[纺锤丝]]和[[染色体]]的变比,这种方式的分裂在蛙的[[红细胞]]中可见。
13,339
次編輯