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Two alleles for a genotype bb bb bb bb one resultant

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Unformatted text preview: from dad). Two alleles for a genotype (BB, Bb, bb) bb) One resultant phenotype. phenotype * Mendel’s Experiments: Why Peas? Mendel’s Peas because peas Peas can self-pollinate (genetically identical) OR cross-pollinate (variation) (variation) traits color color texture height height Punnett square Punnett Used to predict the Used results of genetic crosses crosses Homozygous dominant: two copies of the dominant allele (TT) (TT) Heterozygous: one dominant and Heterozygous: one recessive allele (Tt) one Homozygous recessive—two Homozygous copies of the recessive allele (tt) copies Mendel’s Laws of Inheritance Law of Segregation packets of information keep their individuality Law of Independent Assortment packets of information for different traits sort independently of one another (unless two loci are linked through proximity on a chromosome) Main assumptions of modern model of inheritance: 1. 2. 3. 4. A specific unit of heredity (allele) causes a specific observable trait in an organism Each parent contributes one allele per trait (through the segregation of alleles) The offspring has two alleles for its genotype And one resultant phenotype Complete Dominance Complete If two alleles have a If complete dominance relationship, the phenotype of the heterozygote will not be distinguishable from the phenotype of the homozygo...
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