If you were attempting to explain to Jake how a chromosome looks, you would most accurately tell him it's like a

A cone
B flexible rod
C sphere
D ladder
I believe the correct answer is D

3 answers

http://images.google.com/images?hl=en&q=chromosome&gbv=2
http://cnx.org/content/m15083/latest/01%20Human%20Chromosome.JPG

I don't like any of the answers. A chromosome is a coiled section of DNA, and usually occurs in Pairs. The DNA is much like a ladder, twisted, then coiled.
I am looking at my book right now and it says that Chromosomes are rod-shaped structures found in cells.