Chromosome number is
Fixed for a species
Fixed for an ecosystem
Fixed for a community
Fixed for a biosphere
Who first suggested bidirection $DNA$ replication process
If an isolated strain of $DNA$ is kept at $82-90^o C$, then
Segments of $mRNA$ removed during splicing are called......
A male human is heterozygous for autosomal genes $A$ and $B$ and is also hemizygous for hemophilic gene $h$. What proportion of his sperms will be $abh$
Gene library or $DNA$ library has collection of