1. Pedigree
practice

2.  If individuals I-1 and I-2 had a fourth child, what is the chance that the child would have attached earlobes?
The pedigree below tracks the presence of attached earlobes through a family's generation. Having attached earlobes is an autosomal recessive trait.
1- 0%
2- 50%
3- 75%
4- 100%
Answer is 2- 50%

3. The pedigree below tracks the presence of dimples through a family's generation. Having dimples is an autosomal dominant trait.
If individual III-3 married a woman who was heterozygous for dimples, what is the percent chance their children will have dimples?
1- 0%
2- 50%
3- 75%
4- 100%
Answer is 3- 75%

4. What is the genotype of individual II-2?
The pedigree below tracks Duchenne Muscular Dystrophy (DMD) through several generations. DMD is an X-linked recessive trait.
What is the genotype of individual II-2?
1- XD Xd
2-XD XD
3-XD Xd
4-Xd Y
Answer is 1- XD Xd

5. The pedigree below tracks the presence of dimples through a family's generation. Having dimples is an autosomal dominant trait.
Which of the following individuals is correctly matched with its genotype?
1- I1 (DD)
2- II2 (DD)
3- II3 (dd)
4- III3(Dd)
Answer is 4- III3 (Dd)

6. Which individual in the first generation is a carrier?
1- The male
2-The female
3-individual 1
4-None of the above
Answer is 1- the male

7. What is the inheritance pattern?
1- X-linked recessive.
2- X-linked dominant.
3- autosomal recessive.
4-autosomal dominant
Answer is 2- X-linked dominant

8. What is the inheritance pattern?
1- X-linked recessive.
2- X-linked dominant.
3- autosomal recessive.
4-autosomal dominant
Answer is 4- autosomal dominant