Pedigree and Punnett Square Practice

Sickle cell anemia is a recessive disease. A woman who is heterozygous marries a man who is also heterozygous. What are the chances they will have a child who has sickle cell anemia?

• 0%

• 25%

• 50%

• 75%

• 100%

Sickle cell anemia is a recessive disease. A woman who has sickle cell anemia marries a man who is heterozygous. What are the chances they will have a child with sickle cell anemia?

• 0%

• 25%

• 50%

• 75%

• 100%

Sickle cell anemia is a recessive disease. A woman who is heterozygous marries a man who is homozygous dominant. What are the chances they will have a child with sickle cell anemia?

• 0%

• 25%

• 50%

• 75%

• 100%

Neurofibromatosis 1 (NF 1), is a dominant disease. A woman who is homozygous dominant marries a man who is homozygous recessive. What are the chances they will have a child with NF 1?

• 0%

• 25%

• 50%

• 75%

• 100%

Neurofibromatosis 1 (NF 1) is a dominant disease. A woman who is heterozygous marries a man who is also heterozygous. What are the chances they will have a child with NF 1?

• 0%

• 25%

• 50%

• 75%

• 100%

This pedigree shows inheritance of sickle cell anemia, a recessive trait. What is the genotype of person II, 3?

• ss

• Ss

• SS

• Cannot be determined

This pedigree shows the inheritance of sickle cell anemia, a recessive trait. What is the genotype of person I,2?

• ss

• Ss

• SS

• Cannot be determined?

This pedigree shows the inheritance of sickle cell anemia, a recessive trait. What is the genotype of person II, 1?

• ss

• Ss

• SS

• Cannot be determined

This pedigree shows the inheritance of neurofibromatosis 1 (NF 1), a dominant trait. What is the genotype of person II,4?

• nn

• Nn

• NN

• Cannot be determined

This pedigree shows the inheritance of neurofibromatosis 1 (NF 1), a dominant trait. What is the genotype of person II,5?

• nn

• Nn

• NN

• Cannot be determined