Which of the following statements accurately describes the thymus gland?

A) The thymus gland lacks a capsule.
B) The thymus gland contains many reticular fibers.
C) The thymus gland decreases in size after age 60.
D) Lymphocytes are found only in the medulla of the thymus gland.
E) The thymus increases in size with aging.

In humans, aniridia, a type of blindness, is due to a dominant allele A. Migraine headaches are due to another dominant allele M. If a man who suffers from both conditions (AaMm) marries a woman who suffers from both (AaMm) , what are the chances of an offspring expressing both traits?

A) 9/16
B) 3/16
C) 1/2
D) 1/16
E) 4/16