Principles of Inheritance and Variation

Gynaecomastia is a common feature seen in
The phenomenon which defies the independent assortment is
Wife is PTC non-taster and husband is PTC taster. Their son is taster but daughters are non-tasters. This is not a sex linked trait. Which pedigree is correct?
The law of segregation of characters is also called the law of purity of gametes because
Molecular probes are used for many genetic disorders like