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Vocab for understanding
Mendel
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Trait: Specific characteristic (seed color, plant height)
Generally controlled by 2 alleles of a gene
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Gene: Factors that determine traits (Sections of DNA)
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Allele Different forms of a gene
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Genotype: Combination of alleles inherited from parents
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Phenotype: Physical appearance of the genotype (adjective) Ex/ purple petals, white petals, freckles, blonde hair, brown hair, dimples
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Genotypes and Phenotypes can be found by determining the alleles that were passed down from the parents
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Represented by a capital letter
Dominant Allele: Produces a dominant phenotype in individuals who have at least one copy of the dominant allele Represented by a capital letter P = purple petal color
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Represented by a lowercase letter
Recessive Allele For a recessive allele to produce a recessive phenotype, the individual must have TWO copies of the recessive allele Represented by a lowercase letter p = white petal color
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Heterozygous: Organisms that have two DIFFERENT alleles for the same trait (hybrid) The presence of the dominant allele will produce the dominant phenotype
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Homozygous: Organisms that have two IDENTICAL alleles for a particular trait (purebred) The phenotype will be determined by whether they have two dominant alleles or two recessive alleles
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Following traits through generations:
P : Parent generation F1: 1st filial (1st set of offspring from parents) F2: 2nd filial (offspring of second generation)
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Punnett Square: Grid that shows probable outcome of a genetic cross (fertilization)
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