sisters blood types?

Question

is it possible for two sisters of the same parents to have A+ and O- blood

Answer 1

What was the postman's blood type? :))

The answer is , yes it can be .

Answer 2

yes its possible ..
i will tell you some about the inheritance of ABO system .

there are 3 inheritable factors A , B and O. A and B are Dominant and O is recessive.

Each Blood Groups is Fromed of 2 of these inheritable factors
Blood Group A (A A) or (A O)
Blood Group B (B B) or (B O)
Blood Group O (O O)
Blood Group AB (A B)

Every infant will take 2 factors . one from his dad and from his mom .

According to what you're saying i understood that parents Blood Groups are either

(1) A (A O) and O (O O) so the possible groups of the Children will be ( combine every possible 2 factors ) :
A and O = A
O and O = O

(2) A ( A O ) and A ( A O )
Children will be:
A and A = A
A and O = A
O and O = O

*************************************************************
Also ( Rh - or + ) inherited by 6 factors ( so there are big possiblities for a girl to be + and her sister is -

Answer 3

yes.

Each child gets a gene from each parent for blood type and Rh factor (+ or -).

Type O blood is a recessive gene. This means that in order to have type O blood the child must receive the O gene from both parents. The same is true for Rh-.

If a person is type A, then the genes they inherited from their parents could be AA or AO (type A dominating over type O). The same being true for Rh+ (++ or +-).

This means that each parent must have at least one gene type O blood and one gene for Rh-. However, both parents cannot be type O and both parents cannot be Rh-.

Using this information the parents can have the following blood types.

A+, O-,
B+, B-,
O+, A-

Answer 4

A person with blood type A+ can have alles (A, O or A, A) and either (+,+) or (+, -)

A person with blood type O- can only have alleles (O, O) (-, -)

Each of your parents would have to have at least one copy of the O allele. One would addtionally need a copy of the A allele.

possible parents blood types
A =(A,O)
A (A,A)
O = (O,O)
B =(B,O)

The above aswer for rh factor is correct but for the most part follows dominant (+) trait heritability

You can have parents both heterozygous for rh (+,-)
or one homozygous (-,-) and one heterozygous (+,-)

Answer 5

no longer real. My sister and myself are diverse blood varieties. i'm 0- and he or she's B i think of. All it means is that our father and mom carry an 0 gene. I have been given 2 0's, she basically have been given a million. in the adventure that your father and mom have a rarer variety (hubby and that i are the two 0's), and somebody isn't an 0 too, somebody cheated. All my little ones are 0's. There only isn't the different letters to artwork with. AO and BO father and mom could have little ones with any blood variety. AO and OO could have little ones with AO or OO. same with BO and OO. AB and AB can basically have AB little ones. desire this helped some.

Answer 6

Yes

Use a simple Punnette square and you can see that if both parents have the blood type of A+ O-, then it is possible to hv siblings of A+ O- blood type.

Answer 7

yes it would be quite common in fat since they are the two most common blood types in england.
At least one of your parents would have to be blood group A though.

Answer 8

Yes, Parents have two alleles for blood type and two for rhesus factor,
One parent could have the allelles AO+ and the other AO-

Negative rhesus parent is recessive rr
and + parent must be heterozygous dominant R1r or R2r

the + for rhesus factor can have many forms
CDe/cde R1r Positive
CDe/CDe R1R1 Positive
cDE/cde R2r Positive
CDe/cDE R1R2 Positive
cDE/cDE R2R2 Positive

But negative rhesus is recessive
and can only be

rr Negative

Answer 9

Yes

Answer 10

Yes assuming one parent is heterozygous for A or B. and the same goes for rh factor heterozygisity.

Answer 11

Of cause it's possible.
Provided that the parents' alleles both have O, and either one or both hav an A.