Form6 Biology

staf_ferry

原帖由 hellodizzy 于 15-9-2006 06:59 PM 发表
有谁做了cell tissue like amoeba , hydra ,euglena和bawang的accessment?可以教我吗？result是什么？

就是画出来啊，然后算actual saiz...

hellodizzy

原帖由 staf_ferry 于 15-9-2006 08:51 PM 发表



就是画出来啊，然后算actual saiz...

你可以画给我看吗是怎样的？因为我是转校生，老师又很严格

staf_ferry

原帖由 hellodizzy 于 16-9-2006 08:19 AM 发表

你可以画给我看吗是怎样的？因为我是转校生，老师又很严格

那是看着microsope画出来的啦。

hellodizzy

我的眼睛有问题看了很刺眼，所以才上来问

QooLuo

不能帮到你多少， 但是当你画的时候， 所有cell 都要话完整。不要有一半的。 记住， 生物和美术画法有时侯是不同的。 有擦掉的线记得要擦干净， 不然会扣分。
我的 pratical book 已经交上去了， 所以不能 scan 给你看。

chewboss

原帖由 QooLuo 于 14-9-2006 09:00 PM 发表
还有一题：

A couple who are both normal for blood clotting have two sons. What is the probability that both of them will be haemophiliacs?
A. 1/16
B. 1/8
C. 1/4
D. 1/2

1/4+1/4=1/2

chewboss

原帖由 QooLuo 于 14-9-2006 08:57 PM 发表
第23题的题目是这样的：

从单单d&e来看是1/4,我当a是both recessive

QooLuo

能帮我解这个问题吗？
In ABO blood group system, the alleles responsible to determine the blood group are IA ,I B  ,  IO . Let p = allele frequency for IA ; q = allele frequency for  I B  ; r = allele frequency for IO. Which of the following formula can be used to calculate the frequency of the IA allele?

A. 1- (q2 + 2qr + r2 )
B. 1- √(q2  + 2qr + r2 )
C. √ [ 1- (q2  + 2qr + r2 ) ]
D. 1-  √(p2  + 2pr + r2 )

QooLuo

Down Syndrome may exist in two forms. The classic Down Syndrome affects all cells and is very severe. The mosaic type consist of two or more types of cells which are different in the number and structure of chromosomes. How does the mosaic condition occur?
A. Non-disjunction of chromosomes during meiosis in oogenesis
B. Non-disjunction of chromosomes during meiosis in spermatogenesis
C. Non-disjunction of chromosomes during mitosis during early fetal development
D. Non-disjunction of chromosomes happen in a adult somatic cells