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Multiple alleles

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More than two alternative forms (alleles) of a gene occupying the same locus on a chromosome in a population are known as multiple alleles. The ABO blood grouping is a good example of multiple alleles. In this case, more than two, i.e. three alleles are present governing the same character. Multiple alleles can be found only when population studies are made.
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WRITE SHORT NOTES ON: Multiple allelism

Answer the following questions briefly two to three sentences each. Multiple allelism.

ul("Multiple allelism ") is the phenomenon in which a single gene regulates several phenotypes .

Inheritance of blood group is a condition of: (A) Co-dominance (B) Incomplete dominance ,(C )Multiple allelism (D) Multiple gene

Match column I with column II and select the correct option from the given codes {:(,"Column I",,"Column II"),("A.","Multiple allelism","(i)","Tt" xx "tt"),("B.","Back cross","(ii)","Tr" xx "TT"),("C.","Test cross","(iii)","Human blood groups"),("D.","Crossing over","(iv)","Non-parental gene combination"),("E.","Recombination","(v)","Non-sister chromatids"):}

Match column I with column II and select the correct option from the given codes {:(,"Column I",,"Column II"),("A.","Dihybrid test cross","(i)",9:3:3:1),("B.","Law of segregation","(ii)","Dihybrid cross"),("C.","Lawof independent assortment","(iii)",1:1:1:1),("D.","ABO blood group in man","(iv)","Purity of gametes"),(,,"(v)","Multiple allelism"):}

Define multiple allelism

Phenotypic ratio and genotypic ratio are the same in case of multiple allelism.

With the help of one example, explain the phenomenon of codominance and multiple allelism in human population .