One-hundred-forty-four human X chromosome genes had no counterparts in mice.

X色上有144组因不同于老鼠。

A genome is the haploid set of chromosomes in a gamete, or microorganism, or each cell of a multicellular organism.

因组是指配子、微生物或多细胞生物每个细胞中的单色组。

They have their own genomes too, separate from the main set of chromosomes in a body cell's nucleus.

它们也拥有自己的因组，独立于细胞核内的主要色组。

They've got extra sets of chromosomes.

他们有额外的色组。