Which of the following is incorrectly paired
$Sry$-gene-$X$-chromosome
$2n-2$-nullisomic
Nucleoid prokaryote
Polytene chromosome-Drosophila
A pure breeding pea plant with the dominant phenotype of character $A$ and recessive phenotype of character $B$ was crossed with another pure breeding plant with the recessive phenotype of $A$ and dominant phenotype of character $B. A$ offspring of this cross was crossed with a homozygous recessive for both the characters -$A$ and $B$. The following results are obtained $22$ were phenotypically dominant for $A$ and recessive for $B$.
$4$ were phenotypically dominant for both $A$ and $B$.
$4$ were phenotypically recessive for both $A$ and $B$.
$24$ were phenotypically recessive for $A$ and dominant for $B$.
These results show that
Which one of the following pairs is correctly matched
Repressor of lac-operon
Nobel prize winner E.W. Sutherland demonstrated