论文部分内容阅读
疑问一:不像爹来不像妈,这个孩子谁的娃?正解:孩子长得不像爹也不像妈,这并不等于孩子就不是亲生的。人的相貌、身高、性格和智力这类特征的遗传除受多个基因控制外,还受到非遗传的环境因素影响。人类的遗传特征主要有两类:一类是单纯由某一对等位基因决定的遗传特征,称为单基因遗传特征,如血型、DNA多态性等。父亲与母亲分别将自己的一个基因传给后代,组成孩子的基因型,一旦形成,不再改变。另一类是复杂的遗传特征,
Question one: unlike the father does not like mom, who the baby baby? Positive solution: children do not look like father and mother, this does not mean that the child is not natural. Inheritance of such characteristics as human appearance, height, personality and intelligence is influenced by non-genetic environmental factors in addition to being controlled by multiple genes. There are two main types of human genetic traits: one is a genetic characteristic solely determined by one pair of alleles, which is called single-gene genetic traits, such as blood type and DNA polymorphism. My father and mother respectively pass on one of their genes to future generations to form the child’s genotype. Once formed, they will not change again. The other is a complex genetic trait,