06疾病的多基因遗传 Polygenic inheritance
06疾病的多基因遗传 Polygenic Inheritance
疾痴的多基因遗结 数量性状的多基因遗传 多基因病的遗传
疾病的多基因遗传 ◼ 前言 ◼ 数量性状的多基因遗传 ◼ 多基因病的遗传
写 微效基因( mInor gene) 人类的一些遗传性状或某些遗传病的遗传基 础不是一对主基因,而是几对基因,每一对基因 对遗传性状或遗传病形成的作用是微小的
前言 ◼ 微效基因(minor gene) 人类的一些遗传性状或某些遗传病的遗传基 础不是一对主基因,而是几对基因,每一对基因 对遗传性状或遗传病形成的作用是微小的
多基因遗传( polygenic inheritance) 性状或疾病的遗传方式取决于两个以上微 效基因的累加作用,还受环境因子的影响,因 此这类性状也称为复杂性状或复杂疾病 (complex disease)
◼ 多基因遗传(polygenic inheritance) 性状或疾病的遗传方式取决于两个以上微 效基因的累加作用,还受环境因子的影响,因 此这类性状也称为复杂性状或复杂疾病 (complex disease)
The multifactorial model is (1)Several, but not an unlimited number, loci are involved in the expression of the trait (2) There is no dominance or recessivity at each of these loci (3)The loci act in concert in an additive fashion, each adding or detracting a small amount from the phenotype (4)The environment interacts with the genotype to produce the final phenotype
The multifactorial model is (1) Several, but not an unlimited number, loci are involved in the expression of the trait. (2) There is no dominance or recessivity at each of these loci. (3) The loci act in concert in an additive fashion, each adding or detracting a small amount from the phenotype. (4) The environment interacts with the genotype to produce the final phenotype