Genetics - Research Article from Macmillan Science Library: Animal Sciences

This encyclopedia article consists of approximately 6 pages of information about Genetics.
This section contains 1,684 words
(approx. 6 pages at 300 words per page)
Buy the Genetics Encyclopedia Article

Genetics

Genetics is the study of the mode and mechanism of the transmission of heritable information. Heredity is the passing of a trait from one generation to the next. The heritable information of an organism is contained in its DNA, and the DNA an organism has is called its genome. DNA passes from cell to cell by cell division and from parent to offspring by reproduction.

The actual unit of inheritance is the gene, a region of DNA that codes for one trait. The sequence of DNA makes up the genotype of an individual. A genotype can be for one single gene, for the entire genome of an individual, or anywhere in between. The physical location of a gene on a chromosome is called a locus. The particular copy of a gene at each locus is called an allele. For example, the gene for eye color occurs at one...

(read more)

This section contains 1,684 words
(approx. 6 pages at 300 words per page)
Buy the Genetics Encyclopedia Article
Copyrights
Macmillan Science Library: Animal Sciences
Genetics from Macmillan Science Library: Animal Sciences. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
Follow Us on Facebook