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Genetic vocabulary
Term | Definition |
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Allele | one member in a gene pair that controls characteristics such as eye and hair color |
DNA | Deoxyribonucleic acid, makes up chromosomes and the carries genetic information |
Dominance | situation in which one allele is expressed over a second allele |
Gene | a portion of DNA molecule that serves as the basic unit of heredity |
Genotype | the genetic makeup of an individual organism expressed with letters |
Genetic crossing | the deliberate breeding of two different individuals that results in off spring that carry part of the genetic material of each parent |
Chromosomes | a threadlike structure of nucleic acids and protein that carries genetic information in the form of genes |
Mitosis | asexual cell division where on parent cell divides and produces two identical daughter cells |
Heterozygous | a pair of genes where one allele is dominant and one is recessive |
Homozygous | a pair of genes where both alleles are dominant or both are recessive |
Hybrid | an animal or plant resulting from a cross between genetically unlike individuals |
Independent Assortment | Mendel's law that states that traits are transmitted to offspring independently of one another |
Phenotype | the physical appearance of an organism as distinguished from its genetic makeup |
Punnett Square | a type of grid that can indicate all the possible outcomes of a genetic cross |
Recessive | an allele whose phenotype is masked when paired with a dominant allele |
Segregation | Mendel's law that states that organisms inherit one allele for each trait from each parent due to allele pairs separating during gamete production |
Meiosis | a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell |
Purebred | a homozygous trait where BOTH alleles are the same Ex. TT or tt |
Codominace | when two dominate cells show in an offspring |
Incomplete Dominance | when there is a blending of traits creating an entirely new trait |