Use the Following Figure to Answer the Next Few Questions

question 26

Multiple Choice

Use the following figure to answer the next few questions.

Figure 21.2
Figure 21.2 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.
-The movement of these blocks suggests that

• A) during evolutionary time, these sequences have separated and have returned to their original positions.
• B) DNA sequences within these blocks have become increasingly divergent.
• C) sequences represented have duplicated at least three times.
• D) chromosomal translocations have moved blocks of sequences to other chromosomes.
• E) higher mammals have more convergence of gene sequences related in function.

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Definitions:

Ethmoid Bone

A spongy, delicate bone that forms part of the cranial floor and nasal cavity, contributing to the nasal septum and the orbital walls.

Nasal Conchae

Long, narrow, curled shelves of bone that protrude into the breathing passage of the nose to increase surface area for moistening, warming, or cooling the air entering the lungs.

Ethmoid Bone

A sponge-like, cube-shaped bone located between the eyes, forming a portion of the nasal cavity and the eye sockets.

Auditory Ossicles

Three small bones (the malleus, incus, and stapes) located in the middle ear that transmit sound vibrations from the eardrum to the inner ear.