Genetics unit test study guide vocab

Heterozygous
Having two different alleles for a trait
Homozygous
Having two identical alleles for a trait
Phenotype
An organism physical appearance, or visual trait
Genotype
An organisms genetic makeup, or allele combination.
DNA
Deoxyribonucleic acid; the genetic material that carries information about an organism
Chromosome
A double rod like condensed chromatin
Gene
The set information that controls a trait; a segment of DNA
Allele
The different forms of a gene
Hereditary
The passing of traits from parent to offspring
Trait
Each different form of a characteristic
Genetics
The scientific study of hereditary
Recessive
The allele that is always hidden when a dominant allele is present
Dominant
An allele that always shows up in the organism when the allele is present
Purebred
An offspring of many generations that have the same trait
Hybrid
An organism that has two different alleles for a trait
Codominance
Both alleles are dominant, and the phenotype is a patchwork mixture of the traits
Incomplete dominance
The phenotype result in a blend of two different alleles, because neither allele is dominant or recessive
Punnett square
A chart that shows all possible combinations of alleles that can result from a genetic cross
Probability
A number that describes how likely it is that an event will occur
Electrophoresis
The process used for DNA fingerprinting
Human genome
A map of all human genes