Question

define multiple allelism​

Answer 1

Answer:

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define multiple allelism_??

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Multiple allelism: Mendel proposed that each gene has two contrasting forms/e.. alleles. But there are some genes which are having more than two alternative forms (allele). Presence of more than two alleles for a gene is known as multiple allelism.

A good example is different types of red blood cells that determine ABO blood grouping in human beings. ABO blood groups are controlled by the gene I. The plasma membrane of the red blood cells has sugar polymers that protrude from its surface and the kind of sugar is controlled by the gene. The gene (1) has three alleles , and i/10 Despite the presence of three alleles of the same gene in a population, an individual (2n) can have only two alleles. Therefore, multiple alleles can be detected only in a population. Since there are three different alleles, therefore six different genotypes are possible for this character (1A, 140, , , , 0 or 1).

Now to know, how many phenotype are possible, we have to see the detailed behaviour of alleles. Thus, six genotypes and four phenotypes are possible.

Answer 2

Answer:

the state of having more than two alternative contrasting characters controlled by multiple alleles at a single genetic locus.