sex chromosomes短语¹⁴⁴⁹⁷²⁺² 基本英英例句 奇染色体原型sexchromosome的复数 名词 sex chromosome: genetics a chromosome that determines the sex of an individual Indeed, their differences are roughly some1.2m years younger than the average of all the non- sex chromosomes. 的确，同所有常染色体的平均时间，这对X染色体出现差异的时间要晚得多，约为120万年。 ecocn