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Transcript
Study Guide for the LS. 13 Quiz Important Vocabulary: genes: segments of DNA that carry hereditary instructions and are passed from parent to offspring recessive trait: a trait that is apparent only when two recessive alleles (small letters) for the same characteristic are inherited (for example rr or bb) phenotype: an organism’s inherited physical appearance (blue eyes, tall, curly hair) genotype: the inherited combination of alleles (BB, Tt) DNA: hereditary material that controls all the activities of a cell probability: the mathematical chance that an event will occur heredity: the passing of traits from parents to offspring alleles: two forms of the same gene (represented by letters such as TT, Tt, or tt) dominant trait: a trait observed when at least one dominant allele (capital letter) for a characteristic is inherited (for example Rr or RR)/ A dominant trait will cover up a recessive trait. Important People: - Punnett developed a square that is used to visualize all the possible combinations of alleles in offspring resulting from a genetic cross. - Gregor Mendel is considered the father (first to discover) of genetics. He used plants to study the way traits are passed from one generation to the next. Back Know how to read and draw a Punnett Square.
