Controls division of cell C. Consists of 3 main components 1. The nuclear envelope a. consists of 2 membranes 2. Every different species has a characteristic number of chromosomes called a chromosome number 1. C. Carries hereditary information in forms of genes that determines qualities of an animal or person 1. Blue or brown eyes or tall or short 3.
Mental retardation is moderate to serve ii.
Physical differences include small skull, a short flat- bridged nose, and usually short fingers and neck 5. E. Contains a concentration of RNA 1. Biologists think that RNA is made initially in the nucleus and are stored there.