blood group question?

Question

what would be the probable blood group of a child if the parents have fallowing blood groups and Rh factors;
A positive + A negative =
B positive + B negative =
AB positive + A negative =
O positive + A negative =
O positive + O negative =

Answer 1

1)O-,O+,A-,A+
2)O-,O+,B-,B+
3)A+,A-,B+,B-,AB+,AB-
4)O-,O+,A+,A-
5)O-,O+

Answer 2

ABO and rhesus groups assort independently, so you can consider them separately.

The probability of the outcome of the rhesus group is the same in every case.

The negative parent has genotype -- and the positive parent is either ++ or +-

For the cross ++ x +-, all offspring will be positive, as all will inherit the + allele from the positive parent.

For +- x -- then 50% will be positive and 50% will be negative.

1. For blood group A there are 2 possible genotypes, AA and AO and 3 possible crosses:

AA x AA 100% offspring blood group A
AA x AO 100% offspring blood group A, as all will inherit 1 A allele which is dominant over O.
AO x AO 25% will have blood group O, the rest A. So the most probable outcome will be offspring with blood group A.

2. If you replace the A above with B you get the answer for B as they work in exactly the same way.

3. There are 2 possible crosses:

AB x AA 50% A and 50% AB
AB x AO 50% A (AA and AO) 25% B (BO), 25% AB

4. Again 2 possible crosses:

OO x AA 100% A.
OO x AO 50% A and 50% O

5. All O.

Answer 3

A+ X A - = if the A's are homocigous, A, if not, it could be 0. The same happens with the Rh, it could be + or -
B+ X B - = the same as above, B or 0, + or -
AB+ X B- = in this case it can't be 0 nor A, but it could be AB or B, + or -
0+ X A-=A or 0, + or -
0+ X 0- = It would definitely be 0, but it could be + or -.

In order to determine the real results, you would have to have the 2 alleles for the blood type and the two alleles for the Rh factor, or know the parents' blood type. Otherwise, you can't say for sure. A and B are dominant over 0, and co-dominant between themselves, which means they can both appear at the same time it the genotype is for A and B. Rh + is dominant over Rh -.

Answer 4

A positive + A negative = A+, A-, O+, O-
B positive + B negative =B+, B-, O+, O-
O is recessive. In order for an O result in the above two, both parents must be heterozygous.
AB positive + A negative =A+, A-, AB+, AB-, AB+, B+, B-
For B results, the A negative parent must be heterozygous and give the offspring an o.
O positive + A negative =A-, A+, O-, O+
O is recessive. In order for an O result in the above two, both parents must be heterozygous.
O positive + O negative = O+, O-
RH- is recessive. Any RH+ person can carry the RH- factor.

Answer 5

if i remember clearly from my ap chem, rhesus positive is the more dominant blood group but it won't hurt for you to check your books again:

assuming person with blood type A is AA, B is BB and O is OO...
i could not remember which is more dominant A or B or O...

A positive + A negative = A positive
B positive + B negative = B positive
AB positive + A negative = A positive or AB positive
O positive + A negative = O positive
O positive + O negative = O positive

good luck i hope this helps...

Answer 6

Assuming A = AA, B = BB and O = OO, there would still be a correction to the O+/A- answer - the genotype would be AO+ and the phenotype would be A+.
The original A could also be AO and B could be BO. O is always OO and AB is always AB. That increases the possibilities but I think for the way the question is written, A+ should be sufficient.

Answer 7

1.> A+ or A- or o+ or o-
2.> same here also B in place of A
3> A+ , b+, B-, AB-,
4 A- , o-, o+
5 o+ , o-

Answer 8

it could be o positive

Answer 9

try this site
http://home.comcast.net/~john.kimball1/BiologyPages/B/BloodGroups.html