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Genetics Vocabulary

Glossary of terms that you must know.

TermDefinition
Genotype The genetic make up of an organism
Phenotype An organism's physical appearance i.e how it looks externally.
Homozygous Having the same allele types example an organism is tall because it carries two alleles of the same type (TT)
Heterozygous Oraganism having two different allele type for a trait example (Tt)
Codominance The alleles are neither dominant or recessive and sometimes referred to as incomplete dominance.
Hybrid An organism that results from the breeding of two genetically different individuals example a mule.
Genetics the scientific study of heredity
Heredity The passing of characterics from parents to offspring.
Traits The characteristics that are passed from parents to offspring example eye color.
Purebred An offspring that has many generations of the same traits example Yorkshire terrier.
Genes The factors that control traits
Alleles The different forms of genes example TT or Tt for tallness,.
Dominant allele The allele whose trait always shows up if the allele is present.
Recessive allele The allele that is hidden whenever a dominant allele is present.
Punnett Square The square used in genetics to calculate the frequencies of different phenotypes and genotypes.
Chromosomes The threadlike structure in a cell that carries hereditary information (DNA)
Chromosome Theory This theory states that the genes are carried from parents to offspring on cheromosomes
DNA DeoxyribonucleicAcid
Created by: Gyan mudaliar