Pedigrees - Quiz

1. What are pedigrees used for in science?

• Discovering the relationships between family members
• Working out the ancestry of families
• Tracking the inheritance of specific traits in a family
• Deciding which dog food is the best for pedigree pets

2. Who is the mother of individual III-2?

• III-1
• II-2
• II-1
• I-1

3. How many children does individual I-2 have?

• 1
• 2
• 3
• 4
• 7

4. What is the relationship of II-3 to II-4?

• II-3 is the brother of II-4.
• II-3 is the sister of II-4.
• II-3 is the spouse/partner of II-4.
• II-3 is the father of II-4.

5. How many carriers are there in generation 2?

• 1
• 2
• 3
• 4

6. Using information from the pedigree, what type of disease is Cystic Fibrosis?

• Dominant
• Recessive
• There isn't enough information to work this out

6. Individuals III-2 and III-3 are planning on having a child together. What is the probability of their child having cystic fibrosis?

• 0%
• 25%
• 50%
• 75%
• 100%

7. What is the genotype of individual II-1? (Note: the letter "f" is used to represent the Cystic Fibrosis allele).

• FF
• Ff
• ff
• There is not enough information to work out their genotype

8. Individual II-4 meets a new partner and they decide to have a child together. The partner is a male carrier. What is the probability of their child having cystic fibrosis?

• 0%
• 25%
• 50%
• 75%
• 100%

10. Individual II-2 does a genetic test and finds out that they are a carrier of sickle cell anemia. They state that because they are a carrier, their parents MUST both be carriers too. Is this statement true or false?

• True
• False