人的性別究竟由什么来决定?高中生物课本里的XY型性别决定是这样讲的:如果含有XX染色体的合子发育成雌性个体;如果含有XY染色体的合子发育成雄性个体.随着科学技术的发展,这种性别决定的理论被认为是错误的.新的研究指出:性别的决定不是整个性染色体而是性染色体上的极个别的基因.这个发现是由遗传学家戴维·佩奇为首的研究小组获得的.他们认为,那极个别的基因,虽只代表整个性染色体的千分之一,但这种个别的基因却是决定性别差异的关键. What determines the sex of a human being? The XY gender decision in high school biology textbooks states that if a zygote containing XX chromosome develops into a female individual, and if a zygote containing XY chromosome develops into a male individual, The theory of such gender determinations is considered wrong.The new study pointed out that the decision of sex is not the whole sex chromosome but a very few genes on the sex chromosome.The discovery was led by geneticist David Page Of the research team, who argue that the very few genes, which represent only one-thousandth of the entire sex chromosome, are the key determinants of gender differences.