1. 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

2. 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

3. 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%

4. 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