Colour of endosperm in maize is an example of
Duplicate genes
Inhibitory genes
Polymeric genes
Quantitative inheritance
Linkage was first observed in
The hybrids are generally found to be superior to their parents, it is because of
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.
Number of linkage group in Pisum sativum is
Sexual reproducation leads to