Heredity Lab I

Objective: Determine the likely Phenotype of a theoretical mix between two canines.
Purpose: Demonstrate an understanding of Punnett Squares and Hybridization
Equipment: 4 sided die

Lab Questions

• For each of your genotypes in the original dog you drew, label “heterozygous” or “homozygous”.
• What did you notice about the chances of inheriting the dominant trait when both parents were homozygous and one parent had the recessive trait?
• How did we model the Law of Independent Assortment? Explain.
• How did we model the Law of Segregation? Explain.
• If you were a dog breeder and wanted to ENSURE that your puppy had long legs, droopy ears, and a long body, what PHENOTYPES would you select in the parents?
• Can you be 100% positive that you will get your desired puppy phenotype? Why or why not?
• The Law of Independent Assortment says that genes are inherited independently (alone). But, what if the gene for fluffy fur and the gene for long legs were on the SAME chromosome? How might that impact what allele is inherited? Explain.

Here is a link to the presentation on basic Heredity