Number of linkage group in Pisum sativum is
$2$
$5$
$7$
$9$
Self sterility in "Nicotiana'' was reported by
Gene which suppresses other gene’s activity but does not lie on the same locus is called as
Fraternal twins are produced when
In Drosophila, the allele for a normal grey body colour $G$ is dominant to ebony body $g.$ The following table summarises the results of several crosses
S.No | Cross | Result |
$I.$ | Strain $1 \times$ gg | All wild type |
$II.$ | Strain $2 \times$ gg |
$1$ wild type $:\;1$ ebony |
$III.$ | Strain $3 \times$ gg | All ebony |
$IV.$ | Strain $4 \times$ Gg |
$3$ wild type $:\,1$ ebony |
Which strains both have the genotype Gg?
The given diagram $A$ and $B$ indicates