生物解題 - 考試

各位大師,

小妹做campbell biology 原文書第291第8題就卡關了...

題目如下:

What is the probability that each of the following pairs of parents will produce the indicated offsprings?
( assume independent assortment of all gene pairs)

A> AABBCC x aabbcc---> AbBbCc

解答說: 1x1x1=1 我以為要這樣 1x1x1x1x1x1= 1 兩邊不是各有三個嗎?怎麼只乘一組?

B > AABbCc x AaBbCc ----> AAbbCC

解答: 1/2 x 1/4x1/4 =1/32

這個真的想不出來.....

C> AaBbCc x AaBbCc-----> AaBbCc

解答: 1/2 x 1/2 x1/2= 1/8

我算得是 1/2 x 1/2 x 1/2 x 1/2 x 1/2 x 1/2= 1/64 (天哪><//)

D> aaBbCC x AABbcc -----> AaBbCc
解答: 1 x1/2x1 =1/2

這邊我不懂的是1是指 AA的話,另一個1是CC,那麼1/2是誰?

請各位高手解惑~~謝謝

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