我了个见鬼，学生物的G友进来帮忙一下

Y.LuffyUID: 2996786

原文：
The most vivid expression of such errors occurs in genetically identical (isogenic) organisms. Even when reared under the same conditions, isogenic organisms are rarely exact copies of one another, and their differences have revealed much about the random variations that result from
an organism’s limited supply of genetic information.Daphniae, for example, even though the position, size, and branching pattern of each optic neuron are remarkably constant, there is some variability in connectivity, and the number of synapses varies greatly. This variability is probably the result of random scatter beyond the resolution of genetic control and is best termed “imprecision,”

答案：
There is probably some degree of redundancy in the information controlling neural development.

我了个见鬼，原文明明一直强调information不足，答案怎么就能变成是redundancy？就算是解释成冗余也不对啊。

Y.LuffyUID: 2996786

在线等~~~~

萝卜须根多UID: 3008387

原文哪有一直强调information不足啊，你高亮的部分是说（省略前文）是因为生物体的提供基因信息的不足，而答案中的信息是关于控制神经系统的发展的，这不是同一方面的information
所以答案的关键字neural，定位至Daphniae, for example, even though the position, size, and branching pattern of each optic neuron are remarkably constant, there is some variability in connectivity, and the number of synapses varies greatly. 如果这是全文的话，你可以比较看看

Y.LuffyUID: 2996786

3# 萝卜须根多


那这个redundancy是如何推的？

萝卜须根多UID: 3008387

麻烦你贴个题目先？

Y.LuffyUID: 2996786

我贴一下首段

The more that is discovered about the
intricate organization of the nervous
system, the more it seems remarkable
that genes can successfully specify the
(5) development of that system. Human
genes contain too little information even
to specify which hemisphere of the brain
each of a human's 10'' neurons should
occupy, let alone the hundreds of
(10) connections that each neuron makes.For
such reasons, we can assume that there
must be an important random factor in
neural development, and in particular,
that errors must and do occur in the
(15) development of all normal brains.

Y.LuffyUID: 2996786

23. Which of the following can be inferred from the passage about the genetic information of Daphniae?
I. There is probably some degree of redundancy in the information controlling neural development.
II. Most of the information for neural development stored in the genes is used to specify the positions of the optic neurons.
III. There is sufficient information to preclude the occurrence of gross mistakes during neural development.
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) II and III only

欧液UID: 3149019

看选项2 3 的错误比较来的快啊。。。。。

同学你标红的其实并不重要 variations才是重点
an organism’s limited supply of genetic information其实就是说genetically identical (isogenic) organisms

做个那啥些的解释吧 某家的小孩子长相都差不多 因为长相是多基因决定的 但是血型会很多种（特定情况比如A型B型结婚什么的） 因为血型是单基因决定的（大体上就这意思）
就这么理解吧 没必要在这点下功夫 还是标红标错了

Y.LuffyUID: 2996786

8# 欧液

感谢楼上热心的G友。

我还是不深究原因了，还是继续研究怎么样把答案选出来的好

萝卜须根多UID: 3008387

唔，知道了，题干部分我会直接定位到有Daphniae的地方，就是我开头说的那句以及后面一句。不过那个redundancy是有点疑惑，可以看做是指那个varibility以及后面的This variability is probably the result of random scatter beyond the resolution of genetic control and is best termed “imprecision,”。（这个可能要商讨下）

Y.LuffyUID: 2996786

10# 萝卜须根多

多谢版主！