Mendel cross tall and dwarf plant. In $F_{2}$-generation the observed ratio was $3: 1$ (tall: short). From this result, he deduced
$I.$ law of dominance
$II.$ law of independent assortment
$III.$ law of segregation
$IV.$ incomplete dominance
Choose the correct option
$I, II, III$ and $IV$
$I$ and $III$
$II, III$ and $IV$
$I, II$ and $III$
An organism's genetic constitution is called its
A cross between one tall plant and one dwarf plant resulted in offspring having tall plants. What would be the genotype of offsprings ?
Primary source of allelic variation is
When an individual is having both the alleles of a contrasting character, it is said to be
The important things to remember are that chromosomes as well as genes occur in ...$A$.... The two alleles of a gene pair are located on homologous sites on ...$B$... chromosomes
Choose the correct choice for $A$ and $B$