Fill in the Blanks Molecular basis of inheritanceOnline version Molecular basis of inheritance by Surya Anand 1 bioinformatics Y Bacteria permease BAC Yeast repressor YAC 1 1 . In lac operon , i - gene codes for the . 2 . The y gene codes for . 3 . HGP was closely associated with the rapid development of a new area in biology called . 4 . Chromosome has most genes ( 2968 ) and the has the fewest ( 231 ) . 5 . In HGP , the commonly used hosts were ( ) and ( ) .