Three or more forms of a gene that code for a single trait.
One of the 23 pairs of chromosomes in each body cell.
Their alleles are passed from one parent to child on a sex chromosome.
A person who has one recessive allele for a trait and one dominant allele.
An abnormal condition that a person inherits through genes or chromosomes.
A chart or "family tree" that tracks which members of a family have a particular trait.
A picture of all the chromosomes in a cell.
The process of selecting organisms with desired traits to be parents of the next generation.
A technique that involves crossing two individuals that have similar characteristics.
Breeders cross two genetically different individuals.
An organism that has exactly the same genes as the organism from which it was produced.
A process in which genes from one organism are transferred into the DNA of another organism.
This process involves inserting copies of a gene directly into a person's cells.
Is all the DNA in one cell of an organism.