1. A woman is colorblind. Construct a Punnett square and using versions of the letter “C” determine if she marries a man with normal vision: What are the chances her sons will be colorblind? What are the chances her daughters will be colorblind? What are the chances of having a carrier daughter? 2. Both the husband and wife have normal vision. Their son is colorblind. What can you conclude about the father’s genotype? What about the mother’s genotype? Father: Mother:
1. A woman is colorblind. Construct a Punnett square and using versions of the letter “C” determine if she marries a man with normal vision:
- What are the chances her sons will be colorblind?
- What are the chances her daughters will be colorblind?
- What are the chances of having a carrier daughter?
2. Both the husband and wife have normal vision. Their son is colorblind. What can you conclude about the father’s genotype? What about the mother’s genotype?
- Father:
- Mother:
3. If a young girl has fragile X syndrome, a recessive trait (f), what is her genotype? What are the possible genotypes of her father and mother?
- Mother: _________ or __________
- Father: _________________
- If her brother also developed this condition, which parent (father, mother, or both) contributed a disease allele? Explain your answer as well as constructing Punnett squares to support your answer.
4. Both the mother and father of a hemophiliac son have normal blood clotting. What are the genotypes of the mother, the father, and the son?
- Mom:
- Dad:
- Son:
5. If you remove a cell from the inside of your cheek or elbow, how many sex chromosomes would you find inside each of these cells? Explain your answer.
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