论文部分内容阅读
基因是决定生物性状的基本单位,是具有遗传效应的DNA片断.在真核细胞中,基因的主要载体是染色体,而染色体上的基因又可分为常染色体上的基因及性染色体上的基因,其次在线粒体及叶绿体DNA分子中也含少量基因。如何快速设计科学的试验方案,确认控制某性状的基因到底属于上述基因的哪一类,这是历年高考试题常涉及的重、难点之一,不少考生在解答此类试题时不仅费时多,而且容易出错。
Genes are the basic units that determine biological traits, and are DNA fragments that have a genetic effect. In eukaryotes, the major carrier of the gene is the chromosome, and the genes on the chromosome can be divided into autosomal and sex chromosome genes , Followed by mitochondria and chloroplast DNA molecules also contain a small amount of genes. How to quickly design a scientific experimental program to confirm the control of a trait of the genes in the end belong to which of the above genes, which is often over the years the college entrance examination papers, one of the most difficult and difficult, many candidates not only time-consuming to answer such questions, And prone to error.