Name _________________________ Period ___ Fruit Fly virtual lab Go to our class website www.chabriesscience.wikispaces.com Click 7th grade Click websites, then scroll down “genetics” Click on “Punnett Squares interactive hetero/homo” Follow the directions on the left side of the screen
Scenario #
Genotype of parent 1
Genotype of parent 2
Ratio of offspring genotype
Ratio of offspring phenotype
1. Explain why an organism with a homozygous dominant genotype has the same phenotype as an organism with a heterozygous genotype.
2. Can the genotype for a gray-bodied fly be determined? Why or why not? Describe all of the possible genotypes for a fly with that phenotype.
3. Explain why an organism with a homozygous dominant genotype has the same phenotype as an organism with a heterozygous genotype.