2006-09-01 07:04:52 · 7 answers · asked by E K 1 in Health ➔ General Health Care ➔ Other - General Health Care
If both parents are positive you do not get a negative.
2006-09-01 07:08:04 · answer #1 · answered by Tulip 7 · 0⤊ 1⤋
Yes
A+B both dominant traits over O
+ is dominant trait over -
person has 2 genotypes for every phenotype..so AA and AO both get A blood, etc
A+ means blood is A type and + type which when broken down by genes is either AA++, AA+-, AO++, AO+-
B+ means blood is B type and + type which when broken down by genes is either BB++, BB+-, BO++, BO+-
so if parent with genes AA+- or AO+- had child with another parent of BB+-, BO+- then it is possible child could be AB-
so since ABO is separate from +,- here is breakdown:
Kid has 75% chance of being + and 25% of -
Kid has 56.25% of being AB, 18.75% chance A, 18.75% chance B and 6.25% of being O
works out to like 14% chance of having a AB- child
2006-09-01 07:22:03 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Yes, someone who has Rh+ blood either has two genes for positivity OR one gene for positivity and one for negativity. Since positive is dominant, their phenotype would be positive but they'd not necessarily know what their genotype was.
For two positive parents to have a negative child, each one would have to be carrying a recessive negative gene. They'd have a 75% chance of having a positive child and a 25% chance of having a negative child.
2006-09-01 07:12:09 · answer #3 · answered by mockingbird 7 · 1⤊ 0⤋
I work at a pediatricians office and I can assure you that it is impossible for two positives to have a negative.
2006-09-01 07:14:37 · answer #4 · answered by ready2rumble 2 · 0⤊ 0⤋
No at least one parent has to be negative.
2006-09-01 07:08:37 · answer #5 · answered by BUPPY'S MEME 5 · 0⤊ 0⤋
Ask the mailman what his blood type is :-)
2006-09-01 07:10:39 · answer #6 · answered by BrianR 2 · 0⤊ 0⤋
No
2006-09-01 07:11:16 · answer #7 · answered by Anonymous · 0⤊ 0⤋