1·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。
—— 《柯林斯英汉双解大词典》
2·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。
3·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。
4·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。
5·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。