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Genetics http://www.fdlrez.com/Education/teacherpages/mstracy/life. htm
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What is heredity? The passing of traits from parent to offspring.
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Genes Genes on chromosomes control the traits that show up in an organism
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Alleles Alleles are the different forms of a trait that a gene may have During meiosis a pair of chromosomes separate and the alleles move into separate cells. Each chromosome now contains one gene for each trait
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Genetics The study of how traits are inherited
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Who is Gregor Mendel? The father of genetics The first to use the mathematics of probability to explain heredity and to trace one trait for several generations
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Hybrid Receives different genetic information for a trait from each parent Dominant allele: covers up or dominates the other trait Recessive allele: the trait seems to disappear
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Punnett Square Probability helps you predict the chance that something will happen You can use something called a punnett square to help you predict what an offspring will look like.
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Punnett Square Uppercase letters stand for dominant alleles Lowercase letters stand for recessive alleles Parents’ genes
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Genotype Genotype is the GENETIC MAKEUP of an organism
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HOMOZYGOUS An organism with two alleles for one trait that are the SAME Written TT or tt
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HETEROZYGOUS An organism with two alleles for one trait that are different Written Tt
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PHENOTYPE The way an organism looks and behaves as a result of its genotype
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