If parents are with gene type +-,+- is it possible be the child be ++ positive,+- positive,-- negative
2006-06-11 18:48:30 · 8 answers · asked by memirsa 1 in Science & Mathematics ➔ Medicine
If both parents are RH postive, the child will also be RH positive. There is no chance of RH negativity unless at least 1 parent is negative.
2006-06-11 18:53:23 · answer #1 · answered by Jen 6 · 0⤊ 1⤋
If both parents are Rh(+), there is a chance of the baby being Rh(-).
Two genes determine the blood type. the (+) gene is dominant over the (-) gene. So if you get (+) from one parent, and (-) from the other, your blood type will be (+), but your genes will still be (+) and (-).
If both parents are Rh(+), they still could be carriers of the (-) gene, and in that case there is a 25% possibility of getting a child who has Rh(-) blood.
25% because all possible combinations are:
1. (+) & (+) which will cause the child to have Rh(+) blood.
2. (-) & (+) which will cause the child to have Rh(+) blood (the (+) is dominant).
3. (+) & (-) which will cause the child to have Rh(+) blood.
4. (-) & (-) which will cause the child to have Rh(-) blood.
2006-06-12 01:52:58 · answer #2 · answered by brand_new_monkey 6 · 0⤊ 0⤋
It all depends on whether the parents are homozygous A pos or heterozygous A pos. If they are pure from parents that are pure then the children will be pure. But if they are a mix of both, then there is the possibility. The punnet square only assumes that there was one parent contributing to the factor.
2006-06-12 01:58:06 · answer #3 · answered by The Y!ABut 6 · 0⤊ 0⤋
chances are zero!!Rh groupin is based on three antigens-C,D,E out of wich D antigen is most imporatant.presence of D antigen is Rh positive n absence is Rh negative.there are no heterozygous states like Dd usually,if Dd is present it is called pseudo Rh positive,but it is very rare.so chances are zero.
2006-06-12 07:33:23 · answer #4 · answered by pishku4u 2 · 0⤊ 0⤋
if both parents have +-antigen in the blood the the more possibility is +-in child
2006-06-12 01:53:36 · answer #5 · answered by mohd 2 · 0⤊ 0⤋
zero................. if both are positive RH the child will also be positive.
2006-06-12 01:52:27 · answer #6 · answered by deborah p 3 · 0⤊ 0⤋
form a punette square and all will be answered.
Edit: they can be --. Only ++ (1x), and +- (2x) and -- (1x)
2006-06-12 01:51:26 · answer #7 · answered by D 3 · 0⤊ 0⤋
all are possible
2006-06-12 03:42:42 · answer #8 · answered by Gossamer Moondancer 4 · 0⤊ 0⤋