1、Explain the concept of cistron?What is the conclusion of the cis-trans experiment? What (6分)
答:(1)顺反子是一个功能单位,一个顺反子决定一个多肽链。(2) 顺反实验的结论是:如两个位点可以互补,则两个位点不属于一个顺反子;如两个位点不可以互补,则两个位点属于一个顺反子; (3)顺反子的概念是:基因仅是一个遗传的功能单位;而经典的基因概念是:基因既是个遗传的功能单位,也是遗传的突变单位和重组单位。is the difference between the concept of cistron and the classic concept of gene?
1、There are four rice populations:P1、P 2、F 1、F 2 in a genetic experiment. The days between the planting and heading stage are investigated,the results are as follows:
Population P 1 P 2 F 1 F 2
Mean 110 140 120 125
Variance 12 14 13 50
Try to calculate the broad heritability of the character of heading stage.
2. 在一个小鼠群体中,体重的遗传方差是125,显性方差为35,环境方差为175,计算该群体小鼠体重的狭义遗传率。
加性方差 = 遗传方差 - 显性方差 = 125-35=90。
表型方差 = 遗传方差 + 环境方差 = 125+175=300
狭义遗传率 = 90/300=30%
1、Explain the concept of cistron?What is the conclusion of the cis-trans experiment? What (6分)
答:(1)顺反子是一个功能单位,一个顺反子决定一个多肽链。(2) 顺反实验的结论是:如两个位点可以互补,则两个位点不属于一个顺反子;如两个位点不可以互补,则两个位点属于一个顺反子; (3)顺反子的概念是:基因仅是一个遗传的功能单位;而经典的基因概念是:基因既是个遗传的功能单位,也是遗传的突变单位和重组单位。is the difference between the concept of cistron and the classic concept of gene?
1、There are four rice populations:P1、P 2、F 1、F 2 in a genetic experiment. The days between the planting and heading stage are investigated,the results are as follows:
Population P 1 P 2 F 1 F 2
Mean 110 140 120 125
Variance 12 14 13 50
Try to calculate the broad heritability of the character of heading stage.
2. 在一个小鼠群体中,体重的遗传方差是125,显性方差为35,环境方差为175,计算该群体小鼠体重的狭义遗传率。
加性方差 = 遗传方差 - 显性方差 = 125-35=90。
表型方差 = 遗传方差 + 环境方差 = 125+175=300
狭义遗传率 = 90/300=30%