Answer:
He should request type O on his dating survey.
Opine's blood type must be AO to have a higher probability of producing O offsprings.
Explanation:
O blood type is recessive so, when it is paired with another blood type like B or A, these would be dominant, giving B and A blood, respectively.
O blood type results are possible thanks to OO genotypes.
If the man's blood type is A, to have a higher chance of producing OO offsprings, his blood should be AO. The other possibility is that he has AA blood, which will result in a low probability of OO offsprings.
As regards the mother, her blood type should be OO.
We can see this more clearly in Punnet Square.
â•‘ A â•‘O
Oâ•‘AOâ•‘OO
Oâ•‘AOâ•‘OO Â
There is a 50% of probability of having O offsprings with AO and OO.
 ║ A ║A
Oâ•‘AOâ•‘AO
Oâ•‘AOâ•‘AO
With AA and OO, the probability is 0%
 ║ A ║O
Aâ•‘AAâ•‘AO
Oâ•‘AOâ•‘OO
With both parents having AO, blood the probability of having a OO offspring is 25%.
In conclusion, the higher chances of producing a OO offspring is if the parents are AO and OO.
