Question

Back story: The parental ;generation ;(P) is the first set of parents crossed. The ;F1 ;(first

filial) ;generation ;consists of all the offspring from the parents. You learned about The Law of Segregation as well as The Law of Independent Assortment.

Part l: Genes come in different alleles. A dominant allele hides a recessive allele and determines the organism’s appearance. A Punnett square is a useful tool for predicting genotypes (allele combinations) and phenotypes (observable traits) of offspring from genetic crosses involving Mendelian traits.

1. Make a punnet square for the parents who are heterozygous.
2. What would be the genotypic ratios be? What are the phenotypic ratios of: AA, Aa, Aa, aa? Please give the ratios in this format: 9:3:3:1 (this is just an example).
3. Explain why they are the same or different.

Part ll: This section is to provoke some critical thinking and add some real-life application. Use the same cross in part I and give examples of how Mendellian genetics has improved everyday life or certain industries/business. Give an example labelling ‘A’ and ‘a’ and how knowing an organism or human’s genotype can help us make decisions or improve our lives in some way.