有d野關於mitosis同meiosis唔明...

wilson1993912

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

睇錯問題...[[tk_30]] 己刪

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

ｑ大財神ｐ

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∼＊

原帖由 wilson1993912 於 9-11-2008 09:01 PM 發表
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

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

piyopiyo

原帖由 wilson1993912 於 11-11-2008 21:39 發表
個mother cell carry完meiosis之後自己唔會變左得返23條chromosome咩??

咁又點[[tk_30]]

芒果熙∼＊

原帖由 wilson1993912 於 11-11-2008 09:39 PM 發表
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

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

wilson1993912

原帖由 芒果熙∼＊ 於 12-11-2008 16:49 發表


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∼＊

原帖由 大佬賢 於 13-11-2008 01:30 PM 發表
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...........?