CE 遺傳

cmh_2002

Originally posted by alan_given at 2005-3-11 07:27 PM:


你睇清楚第50題先,佢係問alice's father,alice係colourblindness既female

ic...

咁講colourblind點先可以傳到去個仔到?

alan_given

Originally posted by cmh_2002 at 2005-3-11 07:30 PM:

ic...

咁講colourblind點先可以傳到去個仔到?

只要mother係colourblind,個仔都會係

cmh_2002

Originally posted by alan_given at 2005-3-11 07:32 PM:


只要mother係colourblind,個仔都會係

THX

alan_given

到我問,咁樣有冇錯:
mother colourblind + father colourblind ---> 仔colourblind,女colourblind
mother colourblind + father normal ---> 仔colourblind,女normal
mother normal + father colourblind ---> 仔unknown,女unknown
mother normal + father normal ---> 仔normal,女normal

[ Last edited by alan_given on 11-3-2005 at 07:45 PM ]

cmh_2002

Originally posted by alan_given at 2005-3-11 07:40 PM:
到我問,咁樣有冇錯:
mother colourblind + father colourblind ---> 仔colourblind,女colourblind
mother colourblind + father normal ---> 仔colourblind,女normal
mother normal + father colourbli ...

一個x normal 一個x colorblind=>女係colorblind定 normal?

alan_given

Originally posted by cmh_2002 at 2005-3-11 07:43 PM:

一個x normal 一個x colorblind=>女係colorblind定 normal?

normal

cmh_2002

Originally posted by alan_given at 2005-3-11 07:44 PM:


normal

mother normal + father colourblind ---> 仔unknown,女unknown
咁仔同女都係1/2會colorblind?

Newcastle Fans

Originally posted by alan_given at 2005-3-11 19:40:
mother colourblind + father colourblind ---> 仔colourblind,女colourblind
mother colourblind + father normal ---> 仔colourblind,女normal
mother normal + father colourblind ---> 仔unknown,女unknown
mother normal + father normal ---> 仔normal,女normal

個仔可能會有colourblind
因為佢既X chromosome係黎自阿媽
而阿媽可能係homozygous dominant, 又或者係heterozygous
所以佢個仔有50%係colourblind

alan_given

Originally posted by Newcastle Fans at 2005-3-11 07:48 PM:

個仔可能會有colourblind
因為佢既X chromosome係黎自阿媽
而阿媽可能係homozygous dominant, 又或者係heterozygous
所以佢個仔有50%係colourblind

係喎,thx

Newcastle Fans

而家cert level都要學sex linkage?

cmh_2002

Originally posted by Newcastle Fans at 2005-3-11 07:52 PM:
而家cert level都要學sex linkage?

bio未見過...

lee題係human bio

Newcastle Fans

Originally posted by cmh_2002 at 2005-3-11 19:54:

bio未見過...

lee題係human bio

ic...
but actually sex linkage is not that difficult

cmh_2002

Originally posted by Newcastle Fans at 2005-3-11 07:55 PM:

ic...
but actually sex linkage is not that difficult

human bio d野係咪教得深入d?(cert level)

Newcastle Fans

Originally posted by cmh_2002 at 2005-3-11 19:57:

human bio d野係咪教得深入d?(cert level)

我冇考human bio...
但... 我覺得genetics既野係比較淺, 因為答既野唔會太抽象, 而且好少會答唔中pt