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In genetics, you have to distinguish between two categories of features: features of the phenotype and features of the genotype.
The phenotype are all the features your body actually has, such as your eye color, your hair color, your blood group and your rhesus factor.
The genotype is the information actually contained on your DNA. While you may have blue eyes, your DNA might actually contain data for brown eyes that is simply not translated and therefore doesn't show.
(More in detail, you have two chromosomes for each task, i.e. information for everything in your body exists in two slightly different versions in every one of your cells, but only one of the versions is actually used.)
In the process of meiosis, the chromosome set is halved so that every sperm and every egg cell only contain one chromosome for each task. When they come together, the sets combine and make a whole (doubled) set again.
Now if both your parents were rhesus positive but you're negative, that simply means both your parents have on one chromosome the information for rhesus negative, and by chance a sperm and an egg cell both with rhesus negative met.
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What blood types would your parents have to be to have a child with A positive blood type?
For a child to have A positive blood type, at least one parent must have A or AB blood type. The positive sign indicates the presence of Rh factor, which may come from either parent regardless of their blood type. So, the parents could be AA and AA, AO and AO, or AA and AO.
Can blood be either B positive or negative?
Yes, blood can be either B positive or B negative, depending on the presence or absence of the B antigen on the surface of red blood cells. B positive blood has the B antigen and the Rh factor present, while B negative blood has the B antigen but lacks the Rh factor.
Can a child be O negative if both parents are O positive and three of the grandparents are O positive and one is B negative?
It is possible as the Rhesus factor is a dominant trait. So, even if the parents have only one allele for the factor, there is a 1/4th chance that the child could get neither allele from the parents and end up as O negative.
If both parents are rhesus positive can they have a negative baby?
Yes, it is possible for two Rh-positive parents to have a Rh-negative child if both parents are carriers of the Rh-negative allele. This means that both parents have a recessive Rh-negative gene that they can pass on to their child.
What 3 kinds of blood?
1) Rhesus positive 2) Rhesus negative 3) A 4) B 5) AB 6) O
If two parents have A-negative and O-negative bloodtypes is it possible for their child to be A-positive?
No. Two rhesus-negative parents cannot have a rhesus-positive child.
Can the baby of an O rhesus positive and a A rhesus negative parent be A rhesus positive?
no cause a positive and negative make a negative unless the positive has a really strong blood line
What blood types would your parents have to be to have a child with A positive blood type?
For a child to have A positive blood type, at least one parent must have A or AB blood type. The positive sign indicates the presence of Rh factor, which may come from either parent regardless of their blood type. So, the parents could be AA and AA, AO and AO, or AA and AO.
B Rhesus Positive Anti-P1 negative?
B rhesus positive anti-P1 negative
What blood type will the child be with parents blood type O positive father and mother O positive?
The baby can only be an O Blood Group as both parents can only be carrying 'O' type genes. The baby would have a 75% chance of being an O positive and a 25% chance of being an O negative. This is because the mother can only pass on a Rhesus negative gene but the father might either have two Rhesus positive genes or one Rhesus positive and one Rhesus negative. If the first is true the child will only be O positive, if the second is true it could be O positive or O negative depending on which gene the father passes.
What produces rhesus negative blood in children?
I am a rhesus negative female. Both my parents had rhesus negatinve blood. I was a blue babie and had to have a blood transfusion. The second baby of 2 rh- parents is usually blue.
What blood type will the child be with parents blood type o negative mother and father o positive?
The baby can only be an O Blood Group as both parents can only be carrying 'O' type genes. The baby would have a 75% chance of being an O positive and a 25% chance of being an O negative. This is because the mother can only pass on a Rhesus negative gene but the father might either have two Rhesus positive genes or one Rhesus positive and one Rhesus negative. If the first is true the child will only be O positive, if the second is true it could be O positive or O negative depending on which gene the father passes.
Can blood be either B positive or negative?
Yes, blood can be either B positive or B negative, depending on the presence or absence of the B antigen on the surface of red blood cells. B positive blood has the B antigen and the Rh factor present, while B negative blood has the B antigen but lacks the Rh factor.
If parent both blood group B positive is there any health problem for child?
No. When the mother has a negative blood type and the father has a positive blood type, this could lead to Rhesus factor in the foetus. When both parents are positive blood group, there isn't a risk of becoming rhesus.
Can a child be O negative if both parents are O positive and three of the grandparents are O positive and one is B negative?
It is possible as the Rhesus factor is a dominant trait. So, even if the parents have only one allele for the factor, there is a 1/4th chance that the child could get neither allele from the parents and end up as O negative.
If you have A-positive blood and your father has A-positive your sister has O-positive what does your mom need to have?
Assuming that they are indeed your parents (not adopted ones) then your mother must have O-type blood. Whether she is rhesus-positive or negative cannot be told from the information.
How many blood types are there how blood type is inherited?
To the second question the answer, in short, is YES; To answer the first question, there are four logical blood types: A, B, AB, and O. Then there is the Rhesus factor: either positive or negative. So there are actually eight types of blood a human can have: one of the above types with a negative Rhesus factor or with a positive Rhesus factor. Rhesus factor is a factor which compares human blood to a Rhesus monkey's blood. A negative result means your blood is not comparable to a Rhesus monkey. Blood types are inherited from your parents. If one parent has type A+, and the other has a B-, your blood type can either come out as A, + or -, or B, + or -, or the rare AB, + or - but not O. While type O negative is the universal donor, type AB positive is a universal recipient.
