论文部分内容阅读
遗传与变异类实验是近几年的高频考点,常涉及探究基因的显隐性、基因的位置、变异类型和验证遗传规律等。此类实验的解答依赖于对遗传变异的基本概念和原理的理解和运用,同时还需要认真体会生物学家的探索过程和实验设计方法。类型一:探究相对性状中的显隐性关系1.实验原理:具有一对相对性状的两纯合亲本杂交,子代表现出的性状为显性性状,未表现出的性状为隐性性状。纯合子自交,后代只表现一种性状
Genetic and mutation experiments in recent years, high-frequency test centers, often involving the exploration of gene recessive, the location of genes, types of mutation and validation of genetic law. The answer to such experiments relies on the understanding and use of the basic concepts and principles of genetic variation and the careful understanding of biologists’ exploratory processes and experimental design methods. Type one: to explore the relationship between the apparent recessive relationship 1. Experimental principle: a pair of relative traits of two homozygous parental hybrids, offspring of the performance of the traits as dominant traits, did not show the traits of recessive traits. Homozygous selfing, the offspring only show a trait