The globin gene family in mammals, birds, and reptiles is organized into ?- and ?-globin gene clusters that are located on two different chromosomes. In most fish and amphibians, however, the globin genes are close to each other on one chromosome. At which point (A to E) in the following simplified phylogenetic tree is a chromosomal translocation likely to have happened that placed the ?- and ?-globin genes on two separate chromosomes?

Question

Quizplus · Accepted Answer

It appears that a chromosome translocation event happened about 300 million years ago in the lineage leading to mammals and birds after it diverged from the amphibian lineage.

The Globin Gene Family in Mammals, Birds, and Reptiles Is