Question

A man with type O positive blood married a woman with type B negative blood. The types of blood of their children can be

• A. B positive
• B. O positive
• C. B negative and B positive
• D. O negative and O positive
• E. B negative and positive and O negative and positive

Answer 1

The correct option is E B negative and positive and O negative and positive

Two O blood type parents can produce a child with only O blood type. Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type. One parent with A and another with B can produce a child with A, B, AB or O blood types. If one parent has A and another has AB, they can either produce a child with A, B or AB blood types. If one parent has A and another has O, they can either produce a child with A or O blood types. The Rh (+/-) factor is inherited separately from the ABO blood types. The Rh negative gene is masked by the presence of a Rh positive genotype. Therefore, a person may have a Rh positive blood type and can still have Rh negative gene. 2 parents with Rh positive blood types can have a child with Rhnegative blood type.