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GENETICS 101

main vocabulary for genetics and herdity unit

TermDefinition
TRAIT any characteristic that can be passed from parent to offspring
HEREDITY passing of traits from parent to offspring
ALLELES two forms of a gene (dominant & recessive)
DOMINANCE stronger of two genes expressed in the hybrid; represented by a capital letter (R)
RECESSIVE gene that shows up less often in a cross; represented by a lowercase letter (r)
GENOTYPE gene combination for a trait (e.g. RR, Rr, rr)
PHENOTYPE the physical feature resulting from a genotype (e.g. red, white)
HOMOZYGOUS genotype - gene combination involving 2 dominant or 2 recessive genes (e.g. RR or rr); also called pure 
HETEROZYGOUS Heterozygous genotype - gene combination of one dominant & one recessive allele    (e.g. Rr); also called hybrid
GENE A particular sequence of DNA, the unit of heredity that is passes to the offspring and determines a specific characteristic.
Created by: milogamel
 

 



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