RESUMO
An investigation of palmar patterns on 900 cases Han nationality of China wasmade.The main purpose of this paper is to provide the normal values of Chinese dermatoglyphics and human genetics.The main characters of palmar patterns of Han nationality are as follows:mainline A:type Ⅰ 7.89%,type Ⅲ 91%,type Ⅴ 1.11%;main line B:type Ⅴ 80.72%,type Ⅶ 16.78%,type Ⅸ0.67%,type Ⅺ0.06%,type O(absent)0.11%,typeⅢ 1.67%;main line C:type Ⅴ 38.78%,type Ⅶ 32.67%,type Ⅸ 16.06%,typeⅪ0.44%,type O(absent)12.06%;main line D:type Ⅶ and type Ⅸ all 40.61%,type Ⅺ 18.39%,type O(absent)0.39%.The average value of AD main line formula is 6.50?1.61(SD).There are sig-nificant difference between sexes and two hands(R.L.)(P0.05).The frequency of complicatedpalmar creases is 5.22%.The rate of symmetrical main lines between two hands is34.89%.The main type of A.B.C.D main line is 3.5′.5″.7(18.11%).