Chiasmata firstly seen in
Leptotene
Zygotene
Pechytene
Diplotene
Crossing over is advantageous because it brings about
Which of these is a dominant factor?
$A $: Non-allosomic genic determination of sex is found in bacteria.
$R$ : Sex is dependent on some environmental factors in prokaryotes.
The genes controlling seven traits in pea studied by Mendel were later found to be located on following number of chromosomes
Which of the following phenomena leads to variation in $DNA$?