The Rh factor, specifically the RhD antigen, is typically considered a dominant trait. Individuals who inherit at least one RhD positive allele (Rh+) from either parent will express the Rh+ phenotype. In contrast, those who inherit two RhD negative alleles (Rh-) are considered Rh negative. Thus, Rh+ is dominant over Rh-.
Yes, if both parents each have the dominant positive AND recessive negative genes, they have a 1 in 4 chance of having a child with rh-neg blood. Both mother and father would have to pass the recessive gene to the offspring.
recessive
Yes. Everyone carries a pair of genes for every trait (eyes, hair, even blood type). One is dominant and one is recessive.One of these parents likely a carried the B-Neg blood type on a recessive gene and it was expressed as a dominant trait in the baby.
Recessive
dominant-appears in first generation recessive-seems to dissapear
No. If both parents are Rh negative, they are homozygous recessive for the Rh factor and can only pass on recessive alleles to their children, and a positive Rh factor is a dominant trait.
No - blood group O is recessive, two O parents can only produce an O child. A Rh+ mother and Rh- father can produce either a Rh+ or Rh- child - Rh+ is the dominant factor. No - blood group O is recessive, two O parents can only produce an O child. A Rh+ mother and Rh- father can produce either a Rh+ or Rh- child - Rh+ is the dominant factor.
I am an RN and specialize in genetics. RH- is recessive gene, meaning the parents can both be RH+, which is a dominant gene, and if they both have a recessive gene for RH- they can have a child with RH- blood. There is a 25% chance of this happening, or one out of four children born to this couple. With gene transmutations, etc, it maybe higher, but yes, this is possible.
NO. The alleles that lead to "O-type" blood are recessive to the alleles that lead to "A-type" blood and the child would have to inherit this "A" from one of his/her parents. Given that both parents are "O", there is nobody to inherit the "A" from. (This issue also presents with the exclusive RH- in the parents and RH+ in the child, because RH+ is dominant over the recessive RH-.)
Alleles can be dominant or recessive
Yes. A negative Rh factor is recessive. Everyone has 2 copies of this gene (one from mom, one from dad.) Since positive is dominant and negative is recessive, if you have one of each (heterozygous), you will have a positive blood Rh, but sitll carry the gene for negative Rh. If this is the case for both parents, then the child has a 25% chance of being Rh negative.
Yes, if both parents each have the dominant positive AND recessive negative genes, they have a 1 in 4 chance of having a child with rh-neg blood. Both mother and father would have to pass the recessive gene to the offspring.
is malignant melanoma dominant or recessive
Dominant traits are the traits that mask the recessive traits. The dominant traits are stronger than recessive!
If you have 2 dominant alleles, the gene will be dominant, if you have 2 recessive alleles, the gene will be recessive. But if you have 1 recessive and 1 dominant, the Dominant allele will mask the recessive one.
A recessive trait cannot be dominant over a dominant trait. Dominant traits are always expressed over recessive traits in heterozygous individuals because they mask the expression of the recessive trait.
Recessive