Dominant alleles are expressed in

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(D) Dominant alleles are expressed in both homozygous and heterozygous conditions.According to the Principle of Dominance:In heterozygous individuals

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Both $(b)$ and $(c)$

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(D) Dominant alleles are expressed in both homozygous and heterozygous conditions.According to the Principle of Dominance:In heterozygous individuals or hybrids,a character is represented by two contrasting factors called alleles or allelomorphs. Out of the two contrasting alleles,only one is able to express its effect in the individual. It is called the dominant factor or dominant allele.The other allele,which does not show its effect in the heterozygous individual,is called the recessive factor or recessive allele. The cross between a pure tall and a pure dwarf plant gives all progeny $(F_{1})$ as tall.The character shown by the $F_{1}$ generation is called the dominant character.

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