只用一本书提高英语听力能力!重温经典名著双语阅读小编推荐:跟着纪录片学英语不背单词和语法,轻松学英语
返回列表 回复 发帖

[英伦广角] 2015-02-07 英国议会下院通过“三亲育子”技术法案

提高英语听力能力 找对方法很重要!
If you are confused by three parent embryos, you've come to the right place. This is my kitchen lab. The eggs here, are someone larger. But the principles are the same and allows me to demonstrate what's scientists hope to do with humans. Inside the egg of course, are the 2 bits. The egg yolk contains the nucleus. In there, are the thousands of genes that make a chicken a chicken. In the egg white, are the mitochondrion which make engergy for the cell. They too contain a small number of genes. The problem is, this egg comes from Henry Eter, a very sick hen. Her genes and her mitochondria are defective, so she has a desease of mitocondria. So what scientists want to do is to separate her egg. They want to get rid of the egg white with this defective mitchondria and want to keep her egg yolk with her healthy genes and her healthy nucleus. They also have a donor egg, now both part of that are healthy as there are no problem with that egg. But they also want to go through the same process, so they remove the donated yolk for this nucleus. They put that to one side, and they keep the healthy egg white that aren't bad. And they add to it Henry Eter's nucleus with all her genes to make a new egg. Now believe me, for a few weeks time, that could turn it into a chick, it will be healthy. It will contain Henry Eter's genes but not her desease.
返回列表