Total number of autosomes in fertilized egg of man is
$44$
$22$
$23$
$46$
Exchange of chromosome segments between maternal and paternal chromatids during synapsis in meiosis is called
A normal metaphase chromosome with a midial centromere is
Which site of a $t-RNA$ molecule hydrogen bonds to a $m-RNA$ molecule
The pairing of bivalent synapsis occur in
A model that relates repetitive $DNA$ sequences and their transcripts of regulation in eukaryotes was proposed by