然而，在2000年，科学家曾宣布，X染色体和Y染色体曾经是同卵双胞胎。
However, in 2000, scientists announced that the X and Y chromosomes were once a pair of identical twins.
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。
The scientists found that human and chimpanzee X chromosomes are relatively similar.
采用外周血淋巴细胞培养法，对关中奶山羊和同羊的染色体核型进行分析。
In this paper, chromosomal karyotype of Guanzhong dairy goat and Tong sheep was studied by using the peripheral blood lymphocyte culture method.
初步认为，次级联会产生的原因是非同源染色体之间的同祖关系。赖草染色体组J、N可能来自同一原始染色体组X。
The result showed that the secondary assocition originated from homoeology between J and N possibly originated from same genome X.
初步认为，次级联会产生的原因是非同源染色体之间的同祖关系。赖草染色体组J、N可能来自同一原始染色体组X。
The result showed that the secondary assocition originated from homoeology between J and N possibly originated from same genome X.
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