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The number of **linkage groups** in a species equals:
AThe diploid chromosome number
BThe haploid chromosome number
CTwice the diploid number
DThe number of autosomes only
Answer & Solution
Correct answer: B. The haploid chromosome number
Each homologous pair shares one set of linked genes, so linkage groups = haploid number. Examples: garden pea has 7 pairs of chromosomes ⇒ 7 linkage groups; Drosophila has 4 ⇒ 4.
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