Chromosome Biology

noun A chromosome that is not directly involved in determining the sex of an organism, but may carry genes that affect other traits or characteristics.

• The accessory chromosome carries genes that are not essential for the survival of the organism.
• The extra chromosome has genes that are not really necessary for the organism.
• The bonus chromosome has some genes that are just extra.
• The accessory chromosome is like the cherry on top of the genetic sundae.

adjective a term used in biology to describe a cell or organism that lacks a centromere

• The acentrous cell lacked a centrosome, making it difficult to organize its microtubules.
• The cell without a centrosome is called acentrous.
• That cell is acentrous, it's missing something important for division.
• Her acentrous personality lacked a central focus, making it hard to understand her motivations.