Download Making Gametes – The Principle of Independent Assortment

Name _________________________________________________ Date _______________ Period ______ Making Gametes – The Principle of Independent Assortment Investigating patterns of inheritance allows us to predict the outcome of reproductive events and helps to explain the diversity of characteristics in a population and species. These predictions start with understanding the basis of physical characteristics and the methods of how these characteristics are passed from parent to child. Part A: 1. What is a gene? What does it do? 2. What is an allele? 3. What is a dominant allele? (definition) 4. What is a recessive allele? (definition) Part B: 5. Identify two genes: 1: ______________________ and 2.________________________ 6. For gene 1, identify the alleles. Which is dominant? Which is recessive? Dominant allele: ___________________________ Symbol: _______ Recessive allele: ___________________________ Symbol: _______ 7. For gene 1, identify the alleles. Which is dominant? Which is recessive? Dominant allele: ___________________________ Symbol: _______ Recessive allele: ___________________________ Symbol: _______ 8. Draw the chromosome pair of a cell that contains one dominant and one recessive allele for Gene 1. Color this chromosome green. Label the alleles with the symbols identified above. CV 9. Draw the chromosome pair of a cell that contains one dominant and one recessive allele for Gene 2. Color this chromosome yellow. Label the alleles with the symbols identified above. Name _________________________________________________ Date _______________ Period ______ 10. Now, use the following images to diagram the phases of meiosis that this cell would go through to make four gametes. Use the labels and colors you identified above. CV Initial Cell: (Interphase) CV Prophase I: Metaphase I: Metaphase II: CV CV CV CV Gametes: A B C D 11. What alleles are present in each gamete? Gamete A: _______________________ Gamete C: ______________________ Gamete B: _______________________ Gamete D: ______________________ 12. Consider your gametes and the meiotic events (metaphases) that led to their formation. Can you imagine a different metaphase arrangement that would lead to the formation of different gametes? Explain.