Dear Daisy Dog
I have a science homework assignment that requires me to list a body part for each letter of the alphabet. The only letter that is giving me a problem is Y.
I doubt my teacher will accept “yolk,” which I found in the dictionary. Can you help? Please rush your answer by e-mail.
I am a very bright English setter, so I can think of two answers.
First, the Y chromosome makes dogs and other animals – including you humans – male.
The chromosomes that determine gender come in two varieties, X and Y, and most of us have two sex chromosomes.
A female has two X chromosomes, one from each of her parents. A male has an X chromosome from his mother and a Y chromosome from his father.
A second body part that begins with Y is inside my eye.
The lens that focuses light on the retina has lines that form a Y on the front and back surfaces. These Y-shaped suture lines form where the lens fibers meet.
The Y suture lines are almost always transparent, so they don’t affect vision. However, sometimes cataracts develop along the lines, at least in us dogs.
Update: The student “aced” her homework assignment.