Can parents with blood tipe 0 plus and 0- have a child with 0 plus blood?

Answer 1

I think that's the only blood type they can make.

the doctor said it can happen because every has a primary and secondary (recessive) blood gene. Since my d-i-law's father is A+ and her mother is 0+ and his parents are both 0+ but his mothers mother is A+ and her Father is 0+ there are many recessive A+ genes in their DNA blood type therefore they can have a A+ child. (Example mother is O+/A+ and father is 0-/A+ equals= A+/0 child.) 0 seems to be universal and can throw off a recessive gene.

If one parent is 0+/0- and the other parent is 0-/0+ then the child can take the 0+ or 0- gene type.