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What are some examples of allele's?
Multiple alleles means that for a specific locus on a chromosome there can be 3 or more forms of that gene (allele). Only one allele can be inherited because they are found on homologous chromosomes. Height is not a multiple allele because it is associated with many genes on several chromosomes (plus environmental factors) so this would be polygenic inheritance. Multiple allele trait is the ABO group. The allele for A B or O (3 alleles ) is found on the same locus, therefore only one of them could be inherited EXAMPLE: DNA
What blood types can be formed by crossing A genes with B genes?
Crossing A genes with B genes can produce offspring with blood types A, B, AB, or O. The A and B genes are codominant, meaning they both express themselves in the AB genotype, while the O gene is recessive to both A and B.
Result of ab and b parents?
Depends on the B parent. If the genes of the B parent are B and o, then the offspring could have A, B, or AB. If the genes of the B parent are B and B, then the offspring could have AB or B.
Can a father with type O and a mother with type A have a child with type B?
Yes, at conception the mother's egg has 23 chromosomes and the fathers sperm also carries 23 chromosomes. They join therefor making 46 chromosomes like every other cell in the body. In the chromosomes, there are genes, and in the genes there are strands of DNA that determine internal and external characteristics. If in the family's past there has been someone with the type B blood type then they are more likely to receive that type genetically, but it is still possible even without that because of each person's own unique DNA.
Does everybody in the same family have the same blood type?
Not everyone in the same family has the same blood type. There are two separate genes that determine the blood type a person will have. One is for type such as O, A, AB, or B. The other determines if the blood will be positive or negative. It depends on which genes a person is born with. Both genes are on different chromosomes.
How could parents with blood type A and B have a child with blood type O?
If both parents had heterozygous blood-type genes, then the child could inherit the recessive O type from each parent. Suppose the mother had the genes for A and O, and the father had the genes for B and O. They would then have blood-types A and B respectively. Depending on which parts were passed to the child, any blood type would be possible.
Can an O negative blood type mother and an A positive father have a child with type B blood?
Yes, at conception the mother's egg has 23 chromosomes and the fathers sperm also carries 23 chromosomes. They join therefor making 46 chromosomes like every other cell in the body. In the chromosomes, there are genes, and in the genes there are strands of DNA that determine internal and external characteristics. If in the family's past there has been someone with the type B blood type then they are more likely to receive that type genetically, but it is still possible even without that because of each person's own unique DNA.
Can a b negative blood group girl have a child with o positive?
yes......blood group is completely random. It is dtermined by 2 of the 46 chromosomes so yeah should be possible.....;)
What is the locus of the centers of circles that are tangent to a given circle O at a given point A on circle O?
Join the centre of the circle O and the point A .Extend it to both sides to form a line.This is the required locus
What blood genes are dominant?
A=B>O Blood Type A is equal to Type B, and both of these are dominant to type O. So you can get type A, type B, type AB (mix of A and B because neither one is dominant over the other) or type O.
Can parents with O positive blood have a child with B positive blood?
Only by adoption.... A person's blood type in the ABO system denotes the presence or absence of the A and B antigens. The antigens are molecules on the surface of the red blood cells; Group A people have the A antigen Group B people have the B antigen Group AB people have both A and B antigens Group O people do not have A or B Each person has two genes controlling their ABO blood type; one they inherit from their mother, and one from their father. The A and B genes, if present, will always be expressed, so it is possible to have an A gene and an O gene, but the blood type will be A. If a person is group O, then they have two O genes. If two people who are group O have a baby together, the baby will only inherit the O gene from each parent and will therefore be group O.
Can a b positive woman and a o positive man have a b negative baby?
Yes, provided both man and woman has heterozygous genes for Rh.
