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Biology Ch.6 Genes
Mendel and Genes
Term | Definition |
---|---|
Genotype | Genetic makeup of a specific trait |
Trait | Distinguishing physical characterstics |
Allele | Different forms of a gene that can occur at the same place on the chromosome |
Purebred | Line/ Population of organisms that is genetically the same |
Cross | The mating of two organisims |
Homozygous | Have 2 of the same alleles for a specific trait |
Genome | All of an organisms genetic material |
heterozygous | Have two different alleles for a specific trait |
Recessive | Allele that is NOT expressed when 2 different alleles are present. Is only expressed when there are 2 copies of it. |
Locus | The specific position of a gene, the genes address on the chromosome. |
Dominant | Allele that is expressed when 2 different alleles are present. |
Phenotype | Physical characteristics or traits of an organism. |
Genetics | The study of biological inheritance patterns and variation in organisms. |
Law of Segregation | Law stating the organisms inherit 2 copies of each gene, one from each parent and organisms only give 1 copy of each gene to their offspring. |
Gene | A piece of DNA that codes traits |