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one of two alternate forms of a gene that can have the same locus on homologous chromosomes and are responsible for alternative traits
a condition of retardation and associated physical disorders caused by an extra chromosome in one's genetic makeup
the biochemical units of heredity that make up the chromosomes; a segment of DNA capable of synthesizing a protein
the ordering of nucleotides in DNA molecules that carries the genetic information in living cells
a ratio that shows the varied outcomes that results from a genetic cross and is based on physical appearance alone
A chart that shows all the possible combinations of alleles that can result from a genetic cross
genetically engineered DNA made by recombining fragments of DNA from different organisms
Characteristic such as red-green color blindness, controlled by genes on the X chromosome also called an X linked trait.
sickle cell anemia
a genetic disorder in which erythroctyes take on an abnormal curved or "sickle" shape
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