Chromosomal structure 染色体的结控 D小A27% Prorein蛋自质67% ■RNA6%
Chromosomal structure 染色体的结构 ◼ DNA 27% ◼ Protein 蛋白质 67% ◼ RNA 6%
hromosomal structure 怨色体的四级结构 Nucleosome 110A Nucleosome 60A Elementary fibre 110A Chromatin fibre 360A Acidic protein emli loop Chromatid 0.6 um Chromatin fibre 360A
Nuclesome Chromosomal structure 染色体的四级结构
Homologous chromosomes and autosomes 同源染色体与常染色体 a Homologous chromosomes are those chromosomes that occur in pairs and are generally similar in size and shape, one having coming from the male parent and other from the female parent.二倍体中染色体两两配对,配对 的染色体大小、着丝粒位置都是一样的,这样的染色 体称为同源染色体 Chromosomes related to sex determination such as x and y are sex chromosomes and all the other chromosomes in the genome are called autosomes同源染色体中有一对与性别有关, 称为性染瘁,其它染色体称为常染色体
Homologous chromosomes and autosomes 同源染色体与常染色体 ◼ Homologous chromosomes are those chromosomes that occur in pairs and are generally similar in size and shape, one having coming from the male parent and other from the female parent二倍体中染色体两两配对，配对 的染色体大小、着丝粒位置都是一样的，这样的染色 体称为同源染色体 ◼ Chromosomes related to sex determination such as X and Y are sex chromosomes and all the other chromosomes in the genome are called autosomes同源染色体中有一对与性别有关， 称为性染色体，其它染色体称为常染色体
ryotype analysis染色体组型分析 Karyotype: The chromosome constitution of a cell or an individual, chromosomes arranged in order of length and according to position of centromere 根据各个细胞中染色体的长度大小、着丝粒的位置和随 体的有无等因素把它们排列起来,这就是染体组经 (也叫核型 karyogram) Karyotype analysis chromosomes arranged in order of length and according to position of centromere色体组型分折把多对染色体配对再排列 起来进行研究 Significance of Karyotype analysis染色体组型分析 的意义
Karyotype analysis染色体组型分析 ◼ Karyotype: The chromosome constitution of a cell or an individual; chromosomes arranged in order of length and according to position of centromere 根据各个细胞中染色体的长度大小、着丝粒的位置和随 体的有无等因素把它们排列起来，这就是染色体组型 （也叫核型karyogram） ◼ Karyotype analysis chromosomes arranged in order of length and according to position of centromere染色体组型分析:把多对染色体配对再排列 起来进行研究 ◼ Significance of Karyotype analysis染色体组型分析 的意义
正常男性核型(G带) ))cir If >d Di R( (!i:n Normal human male karyotype
Normal human male karyotype 正常男性核型（G带）