Reference no: EM132158202
Magic Ratios for Genetics:
(a.k.a. a very "corny" lab)
Using Punnett Squares to Predict Phenotypic Ratios
Fill out these punnett squares and use your answers to complete punnett squares and make predictions for the phenotypic ratios of the offspring you would expect to see from such a cross. For these first few exercises, dominant will be black and recessive will be white. You will sometimes be asked to treat the gene as if it has complete dominance, and sometimes as if it has incomplete dominance.
1a) Fill the punnett square out to show a cross between a homozygous dominant and a homozygous recessive
1b) what genotype(s) do you see in the offspring:
1c) Would any of the offspring have a recessive phenotype?
2a) Fill the punnett square out to show a cross between a heterozygous and a homozygous recessive for a trait that is completely dominant
2b) what genotype(s) do you see in the offspring:
2c) what phenotype(s) do you see in the offspring:
2d) What is the phenotypic ratio would you expect for the offspring
3a) Fill the punnett square out to show a cross between a heterozygous dominant and a homozygous recessive for a trait that hasincomplete dominance
3b) what genotype(s) do you see in the offspring:
3c) what phenotype(s) do you see in the offspring:
3d) What is the phenotypic ratio would you expect for the offspring