$A $: Non-allosomic genic determination of sex is found in bacteria.
$R$ : Sex is dependent on some environmental factors in prokaryotes.
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
The evidence that crossing over occurs at four stranded stage and not at two stranded stage of the chromosomes, comes from
When closely placed genes on the same chromosome are inherited together the phenomenon is known as
Mark the correct statement (w.r.t. sickle cell-anaemia)
$MN$ factors are due to
Barr bodies (seen in saliva test in Olympic games) are found in human and are associated with