http://www.youtube.com/watch?v=NWqgZUnJdAY 1. What materials did Mendel use in his work? Why was his main material so useful? 2. What did Mendel mean by the following terms- Law of Segregation and the Law of Independent Assortment? 3. What happened when Mendel crossed purple flowers with white flowers? 4. What happened when Mendel crossed the results of question #3? 5. Define the following genotype phenotype F1 P1 hybrid Male and Female Symbols- Historic reference Male- spear Female- mirror Definitions Law of Segregation: During gamete (sex cells) formation gene pairs separate. This is evident in meiosis. When a sperm or egg cell is being produced, it under goes a reduction in the number of chromosomes by 1/2. This will allow the normal number of chromosomes to occur in the offspring at fertilization. The Principle of Independent Assortment - Genes for different traits assort independently of one another in the formation of gametes. Independant assortment means genes assort independantly, meaning that each gene has a specific trait. For example, your trait for brown eyes won't determine that you have brown hair, because these traits assort into gametes independantly. .