The given pedigree chart shows which type of inheritance?

Assertion : Persons suffering from haemophilia fail to produce blood clotting factor $VIII$.
Reason : Prothrombin producing platelets in such persons are found in very low concentration.

In the formation of the $\beta$-globin chain of hemoglobin,when valine replaces glutamic acid,the shape of the red blood cell becomes sickle-shaped,which leads to ....

Which of the following disorders is caused by a qualitative defect in the synthesis of globin molecules, leading to impaired $O_2$ transport?

Phenylketonuria $(PKU)$ is an inborn error of metabolism caused by the expression of recessive genes $(pp)$. In this condition,the amino acid phenylalanine is not converted into which amino acid,and what type of genetic disorder is it?

Which disorder is related to the quantitative amount of hemoglobin?