8. In an organism if number of linkage group is 12, then the number of haploid set of chromosome is
   (1) 12                   (2) 6

(3) 24                  (4) 4

Introduction:
Understanding the relationship between linkage groups and haploid chromosome sets is essential in genetics. This concept helps explain how genes are organized and inherited. In this article, we address the question: if an organism has 12 linkage groups, what is the number of haploid sets of chromosomes? We explore the options, provide explanations for each, and clarify the correct answer.

Explanation:

• Linkage groups are sets of genes located on the same chromosome that tend to be inherited together.

• The number of linkage groups in an organism corresponds directly to the haploid number (n) of chromosomes.

• Haploid set refers to the total chromosomes in a gamete, carrying one copy of each chromosome.

Option explanations:

1. 12: This is the correct answer. If there are 12 linkage groups, it means there are 12 haploid chromosomes because each chromosome forms one linkage group.

2. 6: Incorrect. This would imply fewer linkage groups than chromosomes, which contradicts the definition.

3. 24: Incorrect. This is likely doubling the haploid number, representing the diploid number (2n).

4. 4: Incorrect. This number is unrelated and less than linkage groups given.

So, if the number of linkage groups is 12, the haploid set of chromosomes is 12.

This explanation is grounded in genetic theory where each chromosome corresponds to one linkage group, reflecting the haploid chromosome count in an organism.