By examining a mitotic spread of chromosomes from a Quagarre B cell, how could you estimate the crea

In the hypothetical extraterrestrial organism, the Quagarre, the immunoglobulin genes undergo rearrangements similar to those in humans, with two main differences. One difference is that the κ  light-chain V regions are located on chromosome 4 and the other κ  light-chain regions are located on chromosome 10. Another difference is that the Quagarre immunoglobulin genes do not rearrange until the creature is 13 years old.

By examining a mitotic spread of chromosomes from a Quagarre B cell, how could you estimate the creature’s age?


Select the two true statements.

 If the regions on chromosome 4 and 10 are associated, the creature is at least 13 years old.
If the regions on chromosome 4 and 10 are associated, the creature is younger than 13 years old.
 If the regions on chromosome 4 and 10 are not associated, the creature is at least 13 years old.
If the regions on chromosome 4 and 10 are not associated, the creature is younger than 13 years old.