Has only half of the diploid chromosomal content that most of the cells, which are called somatic cells in our body have.
卵子中只含有我们机体一半的染色体,二倍体基因组中一半的染色体,这些二倍体细胞称为体细胞
They're not chromosomal differences because this is the ordinary process of mitosis.
它们的染色体没有任何变化,因为这是正常的有丝分裂过程
You put this chromosomal DNA or this DNA that you're interested in, double stranded into a test tube.
你把这个染色体DNA,或者你感兴趣的双链的DNA,放进一个试管
How could I identify in a chromosomal DNA sample whether the sickle gene is present?
那我该怎么确定某染色体DNA样本中,是否存在这种致病基因呢
If I took this same restriction enzyme and tried to cut the chromosomal DNA of a sickle patient, it wouldn't cut at that point because the wrong sequence is there.
而如果我用同样的限制酶,去切割病人的染色体DNA,那该酶是不会起作用的,因为基因序列不对
Well I talked about it - earlier I've mentioned several times all the cells in my body, all the cells in your body have essentially the same genomic chromosomal DNA in their nucleus.
我之前有说过,我不只一次提到过,我体内的所有细胞,和你体内的所有细胞一样,核中的染色体基因组DNA本质上都相同
One way I could try to find the gene for human insulin is to take any cells from any of us, skin cells let's say, and I could identify where on the chromosomal DNA that insulin is likely to occur.
我能找到胰岛素基因的一个方法,是从任意一个人身上任意取一些细胞,比如说皮肤细胞,并且我知道胰岛素基因,可能出现在染色体DNA的哪一部分
We're going to take a chromosomal DNA, we're going to digest it with this restriction enzyme, we're going to put it in this tube and run it on a gel, and we're going to see what results down here.
我们取一条染色体DNA,然后用限制酶进行分解,接着再放,在凝胶上进行电泳,之后看看结果如何
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