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Principle of Herediy

science

TermDefinition
Greqor Mendel The father of Genetics Austrian monk, scientist and educator Famous for his work on genetics and his pea, plant experiment.
character a characteristic of a species such as size or shape
traits a form of a character such a tall or short
purebred an organism that always produces descendants with the same traits for a specific character
hybrid an organism with a mix of alleles for a specific character
dominant a trait of a specific character that appears in a hybrid organism
recessive traits a trait of specific character that is hidden by the dominant trait in a hybrid organism
hybrid crosses when a hybrid crosses with another hybrid
alleles matching genes one from a one parent and one from another parent. an organism has two copies of every gene.
simple dominance the dominate trait is always expressed in a hybrid cross
punnett squares grid that uses letters to represent alleles
genotype the letters that symbolize organism alleles for a specific gene
phenotype the trait that an organism expresses as determined by its genotype
incomplete dominance pattern of inheritance in a hybrid in which traits are blended
codominance pattern of inheritance in a hybrid in which both traits are presented but not blended
multiple alleles three or more variations of a gene that can exist within a population
polygenic inheritance two or more genes interact to control a single character (ex. skin color, height, intelligence )
genetic drift a natural process in which the ratio of alleles in a population changes randomly over time
natural selection the process through which organisms with certain adaptions survive to pass on their traits to a greater number of off springs that other organisms do
adaptation an inherited trait that helps an animal survive to reproduce
Created by: Emma Cheshire
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