Who was the scientist to introduce $ABO$ blood groups
Wiener
Levine
Fisher
Landsteiner
When a plant of $F_1$ generation is crossed with homozygous dominant parents, it is known as
In Drosophila, the sex is determined by
Epistasis and dominance are respectively
If mother and father both are without pigments $(albinism)$, then
When an allele fails to explain itself in presence of the other allele, the former is said to be