If parents blood type does not match when making a baby can the child have trisomy 21? What does blood types and chromesomes have in common?
2006-09-28 19:20:14 · 3 answers · asked by Anonymous in Pregnancy & Parenting ➔ Other - Pregnancy & Parenting
The only thing that they have in common is that chromosomes determine blood type. I am going to refer you to unique.com. They have a registry of all types of chromosome disorders. If your child has this, they have support groups as well. Wonderfull site. My disabled daughter and 4 disabled foster kids are all registered there.
2006-09-28 19:26:36 · answer #1 · answered by glitz_and_glitter 3 · 0⤊ 0⤋
Mismatched blood types is not listed as a risk factor for trisomy 21 at the web sights I found.
Blood "types" are generally simple. Each person has TWO type genes which can be any combination of A, B, or O. There are additional types, but they are so rare we'll ignore them for now.
A and B are "dominant." That is, if either shows up in your genes, they show up in your type. O is recessive. It only shows up in your type if you have TWO "O" genes (one from mom, one from dad).
If the Mom is AB+ she has an A and B to give to the baby, but can only give one. If she had given the baby a B, it would have shown up in the baby's blood type. Mom gave an A, that we can be sure of.
Dad can be any blood type, because of the way the groupings work. Because 2 genes determine blood type, but only one is passed on to offspring, you have to know both of the genes the father may have to know for sure.
He could be "A" - having either AA or AO, and giving the baby either.
He could be "O" - having OO, and giving the baby an O, which doesn't show up in standard testing.
He COULD be "B" - having BO, and given the baby an O.
The only thing you can say for sure about dad is that he is NOT pure B - that is, his blood type has at least one NON-B component.
The baby could be either AA or AO - but you can't tell without further testing because in simple serum tests they show up exactly the same.
2006-09-28 19:36:31 · answer #2 · answered by jbtascam 5 · 0⤊ 0⤋
a baby physically cannot have type A- blood type if the mother has AB+ blood type. and blood type has absolutely nothing to do with downs syndrome.
try this website for more answers:
http://www.ds-health.com/trisomy.htm
2006-09-28 19:23:42 · answer #3 · answered by Anonymous · 0⤊ 0⤋