Fayette County High School-HIST AP US ORY_Mouse Genetics (one trait)- Sarai Johnson-REVIEWED BY EXPERTS

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Prelab Information Purpose Explore the relationship between genotype and phenotype. Time Approximately 45 minutes Question What is the effect of the genes of the parental mice on the fur color of t... he offspring mice? Hypothesis If either parent mouse passes a dominant allele, the offspring will have black fur. Variables Independent Variable: ​genotype of parents Dependent Variable: ​traits of offspring Note: ​The variables will switch their roles (independent vs. dependent) in steps 4 and 5. Lab Procedure In each of steps 1 through 3 on the next page, you will cross a different female and male pair of mice and examine the inheritance of fur color. Repeat the substeps below each time. a) In the Punnett square, fill in the shaded boxes with the alleles of each parent. Use ​B ​for the dominant allele (black fur) and ​b ​for the recessive allele (white fur). b) Fill in the unshaded boxes of the Punnett square with all possible offspring genotypes. c) Based on the genotypes, fill in the table to the right with the predicted percentage (0%, 25%, 50%, 75%, or 100%) of offspring for each phenotype, black or white fur. d) SKIP THIS PART-USE DATA FROM THE SIMULATION.​ Confirm your prediction by simulating ten offspring. You can simulate breeding using technology or by using cards, as described below: [Show More]

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