A gene is said to be dominant if
a) it expresses its effect only in homozygous state
b) it expresses its effect both in homozygous and heterozygous state
c) it expresses its effect only in heterozygous state
d) it never expresses
An antiviral substance produced in cell in response to viral infection to prevent the replication of new virus is
a) antibody b) interferon
c) vitamin C d) antigen
Roots are different from stem in
a) absence of nodes and internodes
b) being positively geotrophic
c) presence of unicellular hairs
d) all of the above
A collection of plants obtained as a result of repeated self-pollination from a single homozygous individual is called
a) mixed selection b) pure line selection
c) mass selection d) clonal selection