genes

• Fruit size appears to be controlled by multiple genes without complete dominance .
  果实大小应由多基因控制，没有完全显性的现象。
• The x-chromosome has many genes for which there are no paired genes on the y-chromosome .
  X染色体有许多在Y染色体上不能配对的基因。
• Morgan evinced no doubts about the relationship between genes and chromosomes .
  摩尔根雄辩地证明了关于基因和染色体之间的相互关系。
• They multiply and pass from generation to generation much like ordinary bacterial genes .
  它们增殖并世代相传，与一般细菌十分相似。
• Biologists are looking into the structure of the molecules that comprise our genes .
  生物学家正在寻找构成我们基因的那些分子的结构。
• Techniques to deal with genes at the molecular level are a most important advance .
  在分子水平上对基因操作的技术取得了极重要的进展。
• Gene cloning provides a means of purifying and propagating specific dna segments .
  基因克隆化提供了一种纯化和扩增特定DNA片段的方法。
• Small changes in the gene pool of a population may actually initiate a flush .
  在种群的基因库中，微小的改变均可实际地诱发一次种群暴长。
• Although the original species becomes extinct, its genes are carried by the new group .
  原来的种虽然绝灭了，但其基因则被一个新的门类所继承。
• Mendelian gene is not a real physical entity but an abstraction or symbol .
  孟德尔式的基因并不是真正的实体，而是抽象概念或者是说明性的符号。