What are multiple alleles?...

What are multiple alleles?

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When any of the three or more allelic forms of a gene occupy the same locus in a given pair of homologous chromosomes, they are said to be called multiple alleles.
Example: Self sterility in Nicotiana is controlled by multiple alleles.

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Self sterility caused by multiple alleles has been reported in _____

pea

drosophila

maize

nicotiana

Assertion : ABO Blood grouping is based on multiple alleles. Reason : There are 6 possible genotypes and 4 possible blood types

A and R are true, R is the correct explanation of A.

A and R are true, R is not the correct explanation of A.

A is true, R is false.

Both A and R are false.

The ABO blood grouping in human beings is an example for i. Dominance ii . Incomplete dominance iii. Co-dominance iv. Multiple alleles

i and ii only

ii, iii and iv

i, ii and iv

iii and is only