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Transcript
Natalia Sivackova Study Guide: pg. 26 Course Companion: pg. Pearson HL: pg. F1 generation had same characteristics of one of the parents F2 generation – characteristic that was lost in F1 reappeared in quarter of F2 Inheritance is based on factors that pass on from generation to generation Called genes Different forms of genes are called alleles Genes – factors that can be passed on from generation to generation Alleles – different forms of a gene F1 generation – the offspring of two parents F2 generation – the offspring of parents from F1 generation Homozygous – having two identical alleles of a gene (have same allele) Heterozygous – having two different alleles of a gene Dominant allele – an allele that has the same affect on the phenotype in a heterozygous individual as in a homozygous individual Recessive allele – an allele that only has an effect on the phenotype in homozygous individuals. In heterozygous individuals the recessive allele is hidden by the dominant allele Genotype – the alleles possesed by an organism (e.g. Ss) Phenotype – the characteristics of an organism (e.g. smooth seed) Punnett squares – used to show all the possible outcomes of a cross Segregation – the seperation of two alleles Genotype Phenotype Segregation http://www.scq.ubc.ca/a-monks-flourishinggarden-the-basics-of-molecular-biologyexplained/ http://www.ucl.ac.uk/~ucbhjow/royal_free/m odel_answer_1998.html
