Each cell of our bodies contains 46 chromosomes.
我们体内的每个细胞都有46条染色体。
Microscopic examination of a cell's chromosomes can reveal the sex of the fetus.
用显微镜检查细胞染色体可以查出胎儿的性别。
Humans have 46 chromosomes, peas have 14, and crayfish have 200.
人类有46个染色体，豌豆有14个，而小龙虾有200个。
The scientists were most interested in parts connected to the ends of the chromosomes.
科学家们对连接到染色体末端的部分最感兴趣。
You know that all of a person's genetic information is contained on very long pieces of DNA called Chromosomes.
你知道，一个人所有的遗传信息都包含在一个叫做染色体的长DNA片段上。
All Y chromosomes in existence today are descended from a single ancestor's who is thought to have lived about 140,000 years ago.
现在存在的所有Y染色体都来自于一个被认为生活在大约14万年前的同一祖先。
It seems that, by looking at the length of the telomeres on specific Chromosomes, we can actually predict pretty much how long certain cells can successfully go on dividing.
看起来，当通过观察特定染色体上的端粒长度，我们实际上可以预测某些细胞能够成功分裂多久。
When researchers look really carefully at the DNA in Chromosomes though, they were amazed to find that only a fraction of it, maybe 20-30%, converts into meaningful genetic information.
当研究人员仔细观察染色体中的DNA 时，他们很惊讶地发现，其中只有一小部分，大约是20%到30%，能转化成有意义的遗传信息。
Because telomeres protect the ends of chromosomes to stop cells dividing.
因为端粒保护染色体末端，阻止细胞分裂。
So after each division, the telomeres get shorter and one of the things that may happen after a while is that pieces of the genes themselves get broken off the Chromosomes.
每次分裂后，端粒变短一段时间后可能发生的一件事是染色体上的基因片段会断裂。
Tetraploidy means cells containing 4 sets of chromosomes atop.
四倍体是指在细胞顶部包含4组染色体的细胞。
The term "homeologous", is used to describe the relationship of similar chromosomes or parts of chromosomes.
术语“同源的”用于描述相似染色体或染色体部分之间的关系。
We humans have 46 chromosomes - 23 pairs.
我们人类有46条染色体——23对。
Two X chromosomes and a blue uniform may not be enough.
而两条X染色体和一套蓝色制服未必就足够了。
All of the other great apes have 24 pairs of chromosomes.
而其他所有的类人猿都有24对染色体。
The new technique checks the chromosomes in the polar body.
这项新技术用于检查极体中的染色体是否异常。
I was born with XY chromosomes, the combination found in boys.
我生下来的时候，染色体为XY，男孩子的染色体才是XY组合。
Humans have 46 chromosomes, peas have 14 and crayfish have 200.
人类有46个染色体，豌豆有14个，而小龙虾有200个。
The number and size of chromosomes varies from species to species.
染色体的数量和长度随物种而不同。
Each species has a different number of chromosomes in their nuclei.
不同的物种在细胞核中有不同的染色体数量。
Is it possible that a pair of chromosomes just got lost in our lineage?
可不可能这对染色体只是在我们人类的族系中丢失的呢？
One pair of chromosomes determines whether the person is male or female.
其中一对染色体决定了此人的性别。
A. Telomeres are the protective caps at the ends of chromosomes in cells.
端粒就是细胞内的染色体上的一个保护罩。
Genes and the important information they carry are packaged inside chromosomes.
基因及其携带的信息被包装进染色体中。
This is the role of structures called telomeres that cap the ends of chromosomes.
这就是盖住染色体各端的端粒结构的功能。
The scientists found that human and chimpanzee X chromosomes are relatively similar.
科学家发现人类的X染色体同黑猩猩的X染色体较为相似。
They pick the healthiest set of chromosomes, preventing the loss of vital variation.
这些卵细胞携带着最健康的染色体组，可以防止编译过程中的基因流失。
They explained that the searches initially focus on 15 regions of DNA on 13 chromosomes.
他们解释说，DNA搜查最初集中在13条染色体所带DNA的15个不同位点上。
They explained that the searches initially focus on 15 regions of DNA on 13 chromosomes.
他们解释说，DNA搜查最初集中在13条染色体所带DNA的15个不同位点上。
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