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Can type a and type a positive can have a child type o positive?
Yes. Type A blood is a dominant gene, and type O blood is a recessive gene. A person can have type A blood and still be a carrier for type O blood. For example, if a person's father had O blood and their mother type A, that person's blood type could actually be AO, because they inherit one gene from their mother and one from their father. Since A is the dominant gene, it dominates over the O and the person is considered to have type A blood, but they are still a carrier for O. If two parents have type A blood but are both carriers for the O gene (AO+AO) their child has a 25% chance of having type O blood (OO). The positive/negative aspect of blood typing is actually referred to the Rh factor and is a separate gene, but a child only needs one Rh positive parent to be Rh positive, because the positive is dominant. So yes, this blood type with these two parents is entirely possible.
What is a homozygus?
When two cells have the same gene type then they are considered homozygous.
If a Mother has A positive blood type Father has A negative blood type what type of blood will the baby have?
Negative blood types are the dominant gene, so it is more likely that the baby will have A- blood, but there is still a chance that it has A+.
What is dominant and recessive?
These are terms used in a punnet square. Dominant is the Phenotype, or a gene that is predicted to be expressed in a heterozygous being- the offspring of two beings with different traits. Recessive is the Genotype, or a gene that is predicted to be hidden in the Deoxyribose Nucleic Acid, (DNA,) of a heterozygous being. Sometimes there is Codominance, where both genes are fully expressed, or incomplete dominance, where the genes are mixed, and are partially expressed.
Is high blood pressure a dominant or recessive gene?
high blood pressure is a recessive gene
Is it possible for a mother to have a positive blood type and father b positive to have a baby with ab negative?
Yes -- There is not one gene that determines blood type. The father can be heterozygous for the A blood type. This just means that the father has one A gene and one O gene. Since the A gene is dominant, the blood from the father tests as A. A separate gene determines the positive and negative part of the blood grouping. This is the RH factor. Again the father can have one gene that is positive and one that is negative, positive is dominant. Same analysis for the mother, mixed B and O genes with B as dominant, positive and negative for RH factor, positive dominant. The egg from the mother could contain the B and RH negative (50% chance of each). The sperm from the father could contain the A and RH negative. Thus the baby would be AB negative (no positive from either parent).
Blood type in humans is determined by a single gene that has multiple alleles?
Each person has two alleles for their blood type, one dominant and one recessive. Except for type AB blood where the alleles are co-dominant. The allele for O blood is always recessive when paired with either an A or B allele.
What type of gene causes traits that are more likely to occur?
a dominant gene.
Can o positive and b negative blood group parents have child?
Absolutely. The parents just have different alleles for the same gene. More information would be needed on the blood type of the parents, but the best guess would be that the child would have blood type B because B is a dominant gene and O is a recessive gene
How is type 1 diabetes passed?
The dominant gene parent
What does co-dominant means?
Co-dominance happens when two genotypes are expressed at the same time. For example, one parent can have blood type A and one parent can have blood type B and together produce a child with blood type AB. If two parents have the blood type AB, the child has a chance of being mentally ill.
Can a baby be born if father is blood type A dominant and mother is blood type O dominant?
Yes. The baby will have either blood type O+ or A+ (I'm assuming you're referring to positive when you say dominant)
