Genetics
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| heredity | characteristics received from an organism's parent
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| Gregor Mendel | father of Genetics who discovered inheritance while working with garden pea plants
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| gene | Segments of DNA found in chromosomes that gives instructions for producing a certain characteristic
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| allele | Different “forms” of a gene
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| dominant | “expressed” or seen in an organism Represented by a capital letter
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| recessive | are not ‘expressed” if a dominant allele is present Represented by a lower case letter
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| phenotype | The form of a trait that an organism displays (what it looks like)
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| genotype | Organism’s genetic composition (two letter combination)
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| polygenic | Inherited characteristics controlled by more than one gene Ex. skin, hair, eyes
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| complete dominance | when you have one trait that is dominant over the other
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| incomplete dominance | Neither allele is completely dominant or recessive Ex. red x white = pink
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| codominance | express both the dominant and recessive trait Ex. spots, stripes or patterns
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| heterozygous | He: when you have two different alleles Ex. Tt, Dd, Ee
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| homozygous | Ho: when you have two of the same alleles Ex. TT, GG, xx, ff
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| hybrid | same as heterozygous; Ex. Tt, Dd, Ee
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| punnett square | a tool used to predict genotype of offsprings in a cross
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| pedigree | traces the occurrence of a trait through generations of a family
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| generations | P Generation: Parents F1 Generation: set of offspring from the parent F2 Generation: set of offspring from the F1 Generation
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| probability | a chance that on possible outcome will occur
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| ratio | an expression to compare two quantities
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| purebred | same as homozygous; Ex. TT, GG, xx, ff
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Created by:
dsookdeo
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