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Unit 4: Heredity

Alleles Different forms of a trait that a gene may have.
Homozygous An organism with two alleles that are the same. (purebred)
Heterozygous An organism with two different alleles for a trait. (hybrid)
Phenotype The physical appearance of an organism.
Genotype The genes of an organism. The actual genetic makeup of an organism.
Dominant A trait that dominates or covers up the other form of the trait
Recessive A trait that is covered up by a dominate trait.
Punnett Square A chart that shows all the possible combinations of alleles.
Heredity The transfer of genetic information from parent to offspring.
Trait A characteristic of an organism, can be genetic or acquired.
Chromosome A single, highly organized and structured piece of DNA.
DNA A double helix structure containing an individual's genetic code.
Gene Small part of a chromosome that determines a specific trait for an organism.
Created by: Davis001