遗传变异是历年生物高考重点,经常以压轴题形式出现。高考有关X、Y同源区段的基因(型)频率还未涉及。事实上,X、Y同源区段的伴性遗传也可以用遗传平衡定律来解释。X、Y染色体是一对异型的同源染色体,X染色体和Y染色体有一部分是非同源的区 Genetic variation is the focus of biological college entrance examination over the years, often in the form of pressure axis problems appear. College entrance examination of X, Y homologous segments of the gene (type) frequency has not been involved. In fact, the inheritance of the X, Y homologous segments can also be explained by the law of genetic equilibrium. X, Y chromosome is a pair of heterogeneous homologous chromosomes, X chromosome and Y chromosome is part of the non-homologous region