Day 1 In rabbits the allele for black coat color (B) is dominant over the allele for brown coat (b). What is the genotype ratio and phenotype ratio from a cross between a heterozygous rabbit for black coat and one homozygous for brown coat? What does dominant mean? What does heterozygous mean? What does homozygous mean? A genetic factor that blocks another. What would be the heterozygous alleles? What would be the homozygous alleles? Alleles are different Bb Alleles are the same bb or BB

In rabbits the allele for black coat color (B) is dominant over the allele for brown coat (b). What is the genotype ratio and phenotype ratio from a cross between a heterozygous rabbit for black coat and one homozygous for brown coat? Genotype: Bb = 50% bb = 50% Phenotype: Black coat = 50% Brown coat = 50% B = Black coat b = brown coat Bb x bb B b Bb bb Bb bb

Heterozygous: _______ LL = __________________ Ll = ___________________ Day 2: The Punnett square below is for a cross between two fruit flies. In fruit flies, the long-wing trait (L) is dominant to the short-wing trait (l). Classify each offspring as homozygous or heterozygous for the trait. Describe the phenotypes of the offspring. LL Homozygous:______ Heterozygous: _______ LL = __________________ Ll = ___________________ What is the % of having long wings? __________ What is the % of having short wings? __________ Ll L LL l Ll long wings long wings 100% 0%

Day 1: In rabbits the allele for black coat color (B) is dominant over the allele for brown coat (b). What is the genotype ratio and phenotype ratio from a cross between a heterozygous rabbit for black coat and one homozygous for brown coat? What does dominant mean? What does heterozygous mean? ________ What does homozygous mean? _________ or ________ What would be the heterozygous alleles? ________ What would be the homozygous alleles? ________ What is the parent cross _______ x __________ Day 2: The Punnett square below is for a cross between two fruit flies. In fruit flies, the long-wing trait (L) is dominant to the short-wing trait (l). Classify each offspring as homozygous or heterozygous for the trait. Describe the phenotypes of the offspring. Day 1: In rabbits the allele for black coat color (B) is dominant over the allele for brown coat (b). What is the genotype ratio and phenotype ratio from a cross between a heterozygous rabbit for black coat and one homozygous for brown coat? What does dominant mean? What does heterozygous mean? ________ What does homozygous mean? _________ or ________ What would be the heterozygous alleles? ________ What would be the homozygous alleles? ________ What is the parent cross _______ x __________ Day 2: The Punnett square below is for a cross between two fruit flies. In fruit flies, the long-wing trait (L) is dominant to the short-wing trait (l). Classify each offspring as homozygous or heterozygous for the trait. Describe the phenotypes of the offspring. Genotype: Phenotype: Genotype: Phenotype: Homozygous:______ Heterozygous: _______ LL = __________________ Ll = ___________________ What is the % of having long wings? _________ What is the % of having short wings? ________ Homozygous:______ Heterozygous: _______ LL = __________________ Ll = ___________________ What is the % of having long wings? _________ What is the % of having short wings? ________ L LL l Ll L LL l Ll