Presentation on theme: "Mendel’s Laws Law of Dominance: if the two alleles at a locus differ, then one, the dominant allele, determines the organism′s appearance; the other, the."— Presentation transcript:
1 Mendel’s LawsLaw of Dominance: if the two alleles at a locus differ, then one, the dominant allele, determines the organism′s appearance; the other, the recessive allele, has no noticeable effect on the organism′s appearance Law of Segregation: the two alleles for a heritable character separate (segregate) during gamete formation and end up in different gametes Law of Independent Assortment: each pair of alleles segregates independently of other pairs of alleles during gamete formation
2 Bell WorkIn a type of lizard called anoles brown skin is dominant to the color green diagram how genes would be expressed in a heterozygous individual with the genotype BbIn the example above what does B stand for?
14 Sex-Linked Inheritance Genes located on sex chromosomes produce different patterns in males and females.Females generally have two alleles for these genes.Males generally have only one allele.If a male inherits a sex-linked recessive allele from his mother, the allele will be expressed.
17 Continuous variationMost traits show a range of variation rather than distinct either/or typesThis occurs when multiple genes and environmental factors influence the trait’s expressionContinuous variation is often described with frequency distribution tables.