Medical Genetics Any syndrome characterized by malformations or malfunctions in any of the body's systems, and caused by abnormal chromosome number or constitution

染色体是遗传物质的载体 遗传现象和规律均依靠: A、染色体形态、结构、数目的稳定; B、细胞分裂时染色体能够进行有规律的传递。 染色体稳定是相对的,变异则是绝对的。 1927年发现:电离辐射→染色体结构变异。 引起染色体结构变异的原因—先断后接假设:染色体折断→重接错误→结构变异→新染色体∴染色体折断是结构变异的前奏

复旦大学上海医学院：《医学遗传学 Medical Genetics》课程PPT教学课件（英文）08基因变异的群体行为 Population Genetics

一、前言 二、诱发基因突变的因素 三、基因突变的一般特性 四、基因突变的分子机制 五、DNA损伤的修复

Muscle cells But if in the same organIsm, should have the same DNA per Nerve cells( cell Different cells have different clusters of genes active Development and differentiation of embryos is controlled by signaling molecules that alter gene expression in cells

复旦大学上海医学院：《医学遗传学 Medical Genetics》课程PPT教学课件（英文）04基因突变的分子细胞生物学效应 cellular effects of gene mutation

1. Base(s) in DNA is (are) changed to other(s), or a base(s) is (are) added or removed. 2. Rearrangements of the chromosomes occur and are also considered

医学遗传学——01绪论

What is Chromatin remodeling Chromatin remodeling(染色质重构)isan important epigenetic mechanism. Chemical modification of the protruding histone tails by the addition of acetyl methyl or phosphate groups can alter chromatin structure, which in turn influences the activity of adjacent genes

1、在番茄中,圆形(O)对长形(o)是显性,单一花序(S)对复状花序(s)是显性。 这两对基因是连锁的,现有一杂交