Lack of independent assortment of genes A and B in fruit fly Drosophila is due to
repulsion
linkage
crossing over
recombination
The genetic material in × 174 is
single-stranded DNA
single -stranded RNA
double-strande DNA
double-stranded RNA
Chromosomes in a bacterial cell can be 1-3 in number and are
never circular
always linear
always circular
always elliptical
The lac operon is an example of
arabinose operon
inducible operon
repressible operon
overlapping genes
Which form of RNA has a structure resembling clover leaf?
t-RNA
r-RNA
m-RNA
hn-RNA
"DNA is a genetic material'' was proved by
Griffith
Watson
Linus Pauling
Messelson and Stahl
The 'Cri-du-chat' syndrome in caused by change in chromosome structure involving
deletion
inversion
duplication
translocation
During the replication of a bacterial chromosome, DNA synthesis starts from the replication origin site and
moves in bi-directional way
RNA primes are involved
is facilitated by telomerase
moves in one direction of the site
DNA acts as a template for the synthesis of
RNA
DNA
protein
both'1' and '2'
Linkage was detected by
Miller
De Vries
Morgan
Mendel