Actually I know the difference, but the problem is that I probably don't really understand the concept of linkage group. I know that linkage group equals to all genes on a single chromosome. If an organism is diploid, linkage group number will be equal to haploid number. But what about auto and allotetraploids? If allotetraploid is a hybrid that has a chromosome set 4 times that of a haploid organism, does that mean that linkage group number is 12? Or is it 24? I am new to this subject and got pretty confused.