What is a gene linkage group? What determines the number of linkage groups for each type of organism?

What is a gene linkage group? What determines the number of linkage groups for each type of organism? Will organisms of the same species have the same number of cohesion groups?

A gene linkage group is a collection of genes located on the same chromosome. The number of linkage groups is equal to the haploid number of chromosomes. A person has 23 cohesion groups

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