A heterozygous A positive person (also heterozygous for positive) is crossed with a heterozygous B negative person. What are the chances (in fraction form) of having an offspring with Type AB negative blood?

1/8

Explanation:

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.