wilson1993912 發表於 9-11-2008 21:01:43

有d野關於mitosis同meiosis唔明...

mitosis係一個分兩個
果兩個係identical
每個有23對chromosome
係唔係?

Meiosis就係一個分4個
但每個得23條chromosome
係唔係?

咁d精子係咪用meiosis黎divide?
如果用meiosis既話,一個得23條chromosome既cell(經過meiosis既daughter cell),點樣再divide?
定係daughter cell已經冇得再divide?

piyopiyo 發表於 9-11-2008 21:17:31

睇錯問題...[] 己刪

[ 本帖最後由 piyopiyo 於 10-11-2008 05:52 編輯 ]

ｑ大財神ｐ 發表於 9-11-2008 22:07:48

咁d精子係咪用meiosis黎divide?
如果用meiosis既話,一個得23條chromosome既cell(經過meiosis既daughter cell),點樣再divide?
定係daughter cell已經冇得再divide?
精子唔會做meiosis= =
精子已經係daughter cell!!=.=
做meiosis係reproductive organ(ovary,testis)
一開始係46條
係divide先變23條 = ="
23條係for combination,係見到egg cell個時

芒果熙∼＊ 發表於 10-11-2008 18:51:57

原帖由 wilson1993912 於 9-11-2008 09:01 PM 發表 http://www4.nakuz.com/bbs/images/common/back.gif
mitosis係一個分兩個
果兩個係identical
每個有23對chromosome
係唔係?

Meiosis就係一個分4個
但每個得23條chromosome
係唔係?

咁d精子係咪用meiosis黎divide?
如果用meiosis既話,一個得23條chromosome ...

sex cells are produced by sperm/egg mother cells which have 23 pairs of chromosomes...
while sperm and egg are daughter cells which cannot undergo cell division(both mitotic and meiotic)

wilson1993912 發表於 11-11-2008 21:39:00

個mother cell carry完meiosis之後自己唔會變左得返23條chromosome咩??

piyopiyo 發表於 12-11-2008 06:04:52

原帖由 wilson1993912 於 11-11-2008 21:39 發表 http://www.nakuz.com/bbs/images/common/back.gif
個mother cell carry完meiosis之後自己唔會變左得返23條chromosome咩??
咁又點[]

芒果熙∼＊ 發表於 12-11-2008 16:49:54

原帖由 wilson1993912 於 11-11-2008 09:39 PM 發表 http://www4.nakuz.com/bbs/images/common/back.gif
個mother cell carry完meiosis之後自己唔會變左得返23條chromosome咩??

一粒mother cell做完meiotic cell division之後會分成四粒daughter cells(23 chromosomes).
但係mother cell可以做meiotic cell division之外
仲會做埋mitotic cell division
分完之後有兩粒46條chromosome既daughter cells..
而尼d daughter cells亦都可以做晒兩種cell division(二選一)...

p.s.考果陣如果佢問你cell division唔好答mitosis/meiosis..
       尼兩隻係nuclear division..答左當錯的

大佬賢 發表於 13-11-2008 13:30:45

meiotic cell division後既daughter cell(i.e. sperm/egg)可唔可以做cell division?

wilson1993912 發表於 13-11-2008 22:31:13

原帖由 芒果熙∼＊ 於 12-11-2008 16:49 發表 http://www.nakuz.com/bbs/images/common/back.gif


一粒mother cell做完meiotic cell division之後會分成四粒daughter cells(23 chromosomes).
但係mother cell可以做meiotic cell division之外
仲會做埋mitotic cell division
分完之後有兩粒46條chromosome既 ...
咁我明啦-.-
我以為mother cell靜係可以有meiosis-.-

芒果熙∼＊ 發表於 14-11-2008 16:45:38

原帖由 大佬賢 於 13-11-2008 01:30 PM 發表 http://www4.nakuz.com/bbs/images/common/back.gif
meiotic cell division後既daughter cell(i.e. sperm/egg)可唔可以做cell division?

唔得..分完之後你想佢有幾多條chromosome= =?
11.5條定係5.75條...........?
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