In crop improvement programmes,haploids are i | vedclass

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(D) Haploids contain only one set of chromosomes $(n)$.When these haploid cells are subjected to diploidisation (doubling the chromosome number,often

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Form perfect homozygous individuals on diploidisation

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(D) Haploids contain only one set of chromosomes $(n)$.When these haploid cells are subjected to diploidisation (doubling the chromosome number,often using chemicals like colchicine),they produce individuals that are completely homozygous for all traits.This is highly advantageous in plant breeding programmes because it allows for the rapid development of pure lines,eliminating the need for multiple generations of self-pollination to achieve homozygosity.Therefore,the correct option is $D$.

In crop improvement programmes,haploids are important because they:

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