List of top Biotechnology Questions on Gene Regulation asked in IIT JAM BT

A schematic representation of restriction fragment length polymorphism (RFLP) analysis of a sample population is shown below. The number of people exhibiting a given pattern is indicated above the lanes. 

Calculate the frequency of the 6.5 kb allele. [Correct to two decimal places] 
 

Heterozygous female fruit flies with gray body and purple eyes were mated with homozygous males with black body and red eyes. The number of offspring obtained and their phenotypes are shown below: 

Calculate the recombination frequency. 
 

A mutation in the operator locus of lac operon that confers constitutive expression of β-galactosidase is .............
When bacteria are grown in glucose-depleted media containing high concentration of lactose, expression of lac operon genes is activated by