The number of linkage groups in an organism with sex chromosomes equals:
A)1n
B)2n +1
C)1n + 1
D)2n + 2

Question

Quizplus · Accepted Answer

Linkage groups are determined by the number of chromosomes that are independently inherited. In organisms with sex chromosomes, one chromosome (the X or Y) is typically larger and has different genes than the other, non-sex chromosomes. Therefore, the number of linkage groups will be equal to the number of non-sex chromosomes (which is equal to the haploid number or 1n) plus one for the sex chromosomes, resulting in 1n + 1.

The Number of Linkage Groups in an Organism with Sex