A pleiotropic gene
controls a trait only in combination with another gene
controls multiple traits in an individual
is expressed only in primitive plants
is a gene evolved during Pliocene.
Who has putforth Mendel's conclusions in the form of laws
The defect sickle-cell anaemia is caused by the ______ of glutamic acid by valine at the $6^{th}$ position of the ______ globin chain of the haemoglobin molecule.
Self sterility in "Nicotiana'' was reported by