BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS
BLOOD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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environment
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genetics
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both environment and genetics
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your children’s blood type
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Detailed explanation-1: -A third version of this gene, the O allele, codes for a protein that is not functional; it makes no surface molecules at all. Everyone inherits two alleles of the gene, one from each parent. The combination of your two alleles determines your blood type.
Detailed explanation-2: -They are inherited. Like eye color, blood type is passed genetically from your parents. Not all blood is alike. There are eight common blood types and many rare ones.
Detailed explanation-3: -A person’s blood group is determined by a pair of genes-one gene inherited from each parent. Each blood group is identified by its own set of molecules (called antigens), which are located on the surface of red blood cells.
Detailed explanation-4: -Blood groups are hereditary. They have a Mendelian pattern, in other words, they are the product of a single gene. The ABO gene has three types of alleles: A, B, and O. The first two, A and B, are codominant, in other words, they dominate equally.