Question

Hello I need help with these questions based on the table. Thanks

Table:

Name   Type Blood   Possible ABO Genotypes   Possible Rh Genotypes
Ms. Brown O- OO NEGATIVE - -

Mr. Smith. A+ AA OR AO. POSITIVE ++ OR +-
Mr. Jones B- BB OR BO. NEGATIVE - -
Mr. Green AB+ AB. POSITIVE +- +-

2. Can you rule out any of the men as Lisa’s father based ONLY on his ABO type? Explain your answer.

3.   Can you rule out any of the men as Lisa’s father based ONLY on his Rh type? Explain your answer.

4. Which of the MEN could safely donate blood to Lisa? Explain your answer.

Lisa has O+ blood

Answer 1

Answer 2) Considering only blood type either Mr. Smith or Mr. Jones can be Lisa's father. considering her mother Ms Brown.

As according to the blood group system

• Mother with AB blood type can either pass the A or B allele to the child. father with O blood type can pass O allele to child
• If both parents have O blood type, child will also have O blood group.
• If both parents have A blood type, they will pass either A or O blood group to the child.
• If both parents have B blood type, they will pass either B or O blood group to the child.
• If one parent is A and another is B, child may have either A,B,AB or O groups.
• If one parent is A another is AB, child may have either A,B or AB groups.
• If one parent is A and another is O, child may have A or O blood group.

Hence considering Lisa has O blood group and her mother Ms Brown having O blood group father may be having either A or B blood group.

Answer 3) Yes, Mr. smith can be Lisa's father.

As according to Rhesus (Rh) blood group system

• If both parents are Rh +, the child may have either Rh + or Rh -.
• If both parents are Rh -, the child will have Rh - .
• If one parent have Rh- and another have Rh + , the child may have either Rh + or Rh-.

Hence as Lisa has O+ blood group and her mother Ms Brown has O- blood group her father must be having either A+ or B+ blood which matches to Mr Smith.

Answer 4) As Lisa have O+ blood group she can only receive O+ or O- blood, none of the men in the table have O blood group hence no one can donate blood to Lisa.