1.You created six craft sticks that have writing on both sides to represent a pair of homologous chromosomes.
Which chromosome number(s) are autosomes, which chromosomes number(s) are the sex chromosomes.
2.What are homologous chromosomes?
3.State Mendel’s Law of Segregation. (In your first notes from the heredity unit with a picture of Gregor
Mendel). Explain how using only the information facing upward for your offspring demonstrates this law. )
4.The gene for freckles is dominant (F), yet most people world-wide do not have freckles. Suggest why this
happens. (The reason is similar for why most people do NOT have Huntington's disease.)
5.Suggest why your lab children likely exhibit less genetic variation than actual human siblings.
6.Crossing over is a source of genetic variation that was not demonstrated in this lab. What would we have
needed to do in the lab to model this process?
Sample Solution