What percentage of a offspring blood type be if one parent is a O type and the other one is a B type

If the father is heterogeneous, there is a 50% probability for a blood type A child and a 50% probability for a blood type O child. If the father is homologous, every offspring will be blood type A.

Explanation:

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.