Child's blood type is A Rh negative. What chances are a male with A Rh positive blood being the father?

Question

Child's blood type is A Rh negative. What chances are a male with A Rh positive blood being the father?

Answer 1

50/50 The mother could be RH- while the father is positive and vice versa.

Answer 2

what is the mothers blood type?  okay so it doesn't really matter the mothers blood type--however if the mother is negative that heightens the chances.

the negative is recessive however if both parents carry a recessive gene or the one is Rh negative and the other carries an Rh negative recessive gene it is possible

let's say the mother is Aa to keep things simple

if both parents carry a recessive gene  1/4

        a+ a-

a+   A+ A+

a-    A+A-

if the mother is A- and father carries a recessive gene 2/4

         A- a-

a+    A+A+

a-     A- A-

the father doesn't carry a recessive gene

0/4

Clearly if the mother gave birth to the child she is either Rh negative or carries an Rh negative recessive gene

Answer 3

Short answer: 0%, 25%, or 50%, depending on the man's genotype and his partner's genotype.

The Rh factor is a dominant trait.  That is, if you get it from either of your parents, you will be Rh positive.  So the chances kinda depend on the genotypes of the parents, not just the phenotypes.

If the man has 2 copies of the Rh gene, any child he fathers must be Rh positive.

However, if he only has one copy of the Rh gene, it may be possible for him to father an Rh- child if his partner also carries one or 2 copies of the Rh gene.

Answer 4

never heard of it

Answer 5

What is the mothers blood type? I am pretty sure both my parents are RH positive and I am A- so it is quite possible.