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Terms from 7th Grade Prentic Hall Science Explorer, pages 530-535

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A priest in the mid nineteenth century that did experiments with pea plants that revolutionized the study of heredity.   Gregor Mendel  
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The passing of physical characteristics from parents to offspring.   Heredity  
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Different characteristics in genetics are called what?   Traits  
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The study of heredity   Genetics  
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The process where a new organism begins to form when the egg and sperm join.   Fertilization  
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The process of pollen reaching the pistil of a flower so fertilization can occur.   Pollination  
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The offspring of many generations that have the same trait.   Purebred  
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The parental generation is represented by what symbol?   P  
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The first filial generation (offspring of parental generation)is represented by what symbol?   F1  
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The second filial generation (offspring of F1 generation) is represented by what symbol?   F2  
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The factors that control a trait.   Gene  
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Different forms of a gene which controls the traits an organisms inherits from its parents.   Alleles  
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An allele whose traits always show up in the organism when the allele is present. It is represented by a capital letter.   Dominant Allele  
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An allele that is hidden whenever the dominant allele is present. It is represented with a lower case letter.   Recessive Allele  
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An organism that has two different alleles for a trait.   Hybrid  
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What carries the information that controls inherited characteristics   Chromosomes  
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Having two different alleles for a trait.   Heterozygous  
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Having two identical alleles for a trait.   Homozygous  
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Genetic makeup of an organism   Genotype  
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Observable physical traits of an organism.   Phenotype  
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