Use the following figure to answer the next few questions.

This figure shows a diagram of blocks of genes on human chromosome 16 and the locations of blocks of similar genes on four chromosomes of the mouse.
-Which of the following represents another example of the same phenomenon as that shown in the above figure?
A)the apparent centric fusion between two chromosome pairs of primates such as chimps to form the ancestor of human chromosome 2
B)the difference in the numbers of chromosomes in five species of one genus of birds
C)the formation of several pseudogenes in the globin gene family subsequent to human divergence from other primates
D)the high frequency of polyploidy in many species of angiosperms

Question

Use the following figure to answer the next few questions.
  
This figure shows a diagram of blocks of genes on human chromosome 16 and the locations of blocks of similar genes on four chromosomes of the mouse.
-Which of the following represents another example of the same phenomenon as that shown in the above figure?
A)the apparent centric fusion between two chromosome pairs of primates such as chimps to form the ancestor of human chromosome 2 
B)the difference in the numbers of chromosomes in five species of one genus of birds 
C)the formation of several pseudogenes in the globin gene family subsequent to human divergence from other primates 
D)the high frequency of polyploidy in many species of angiosperms

Quizplus · Accepted Answer

The diagram in the figure shows the conservation of blocks of genes on human chromosome 16 and how they are also present on four different mouse chromosomes. This phenomenon is a result of a common ancestor of humans and mice having these blocks of genes, which then underwent different rearrangements in the two lineages. Similarly, the centric fusion of two chromosome pairs in primates such as chimps to form human chromosome 2 is an example of a rearrangement that occurred in the human lineage but not in the chimp lineage, resulting in a chromosome with blocks of genes conserved across both. The other choices do not relate to the specific phenomenon shown in the figure.

Use the Following Figure to Answer the Next Few Questions