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In humans, the inheritance of many traits, including blood type, is determined by multiple genes. The ABO blood group system is one such example. The ABO system is controlled by three alleles, which are alternative forms of the same gene, on chromosome 9. The three alleles are A, B, and O.

Each person has two copies of the ABO gene, one inherited from each parent. The A and B alleles are codominant, meaning that if a person inherits both A and B alleles, they will express both A and B antigens on their red blood cells. The O allele is recessive, meaning that a person must inherit two copies of the O allele to express the O antigen.

Because both the A and B alleles are codominant, neither is considered dominant over the other. Therefore, males do not carry the A allele as a dominant gene. Instead, they can inherit either the A or B allele from either parent, or they can inherit two copies of the O allele, which would result in the O blood type.

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masterkid

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βˆ™ 1y ago
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AnswerBot

βˆ™ 5mo ago

The A gene on the X chromosome is a dominant gene. Males only have one X chromosome, so if they inherit an A allele on that chromosome, they will exhibit the trait associated with that gene.

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βˆ™ 12y ago

yes

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Q: Does male carry the A dominate gene?
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