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Genetics and Heredity Part III. Every path has its puddle. English proverb. Today’s Agenda. Dihybrid crosses Incomplete dominance Codominance Polygenic. Dihybrid SetUp PpSs X PpSs. Dihybrid SetUp PpSs X PpSs. PS. Dihybrid SetUp PpSs X PpSs. PS. Ps. Dihybrid SetUp PpSs X PpSs. pS.
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Genetics and Heredity Part III Every path has its puddle. English proverb
Today’s Agenda • Dihybrid crosses • Incomplete dominance • Codominance • Polygenic
Dihybrid SetUp PpSs X PpSs pS PS Ps
Dihybrid SetUp PpSs X PpSs ps pS PS Ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
Dihybrid SetUp PpSs X PpSs pS PS Ps ps PS Ps pS ps
9:3:3:1 pS PS Ps ps PS Ps pS ps
Obj. 9 Incomplete Dominance • Definition: • A condition in which a trait in an individual is intermediate between the phenotype of the two parents because the dominant allele is unable to express itself fully.
Example of Incomplete Dominance: • Red snapdragon X white snapdragon • All offspring are pink snapdragons
Codominance • Definition: a condition in which both alleles for a gene are fully expressed. • Ex. Blood Types
Polygenic • Definition: a characterisitc of an organisms that is determined by many genes • Ex. Eye color, height, weight
Multiple Alleles • Genes with three or more alleles • Example: Blood groups • A = AO, AA • B = BO, BB • AB = AB • O = OO