$9 : 3 : 3 : 1$ ratio is modified to $9 : 7$ ratio due to
Complementry gene
Epistatic gene
Hypostatic gene
Supplementry gene
Two offspring developed in the same uterus but from fertilization of two different ova are
If in a child of $10$ years ages of the intelligence is of $14$ years child, the $I.Q.$ of this child would be
Mendel enunciated
Brachydactyly is due to
Cytoplasmic male sterility in maize is manifestation of interaction between