Have an account?
Skip to Content
Build your own quiz
6 questions
Show Answers
See Preview
- 1. Multiple Choice
The pedigree below tracks the presence of attached earlobes through a family's generation. Having attached earlobes is an autosomal recessive trait.
What is the genotype of individual I-1?
XeY
ee
EE
Ee
XEY
- 2. Multiple Choice
The pedigree below tracks the presence of dimples through a family's generation. Having dimples is an autosomal dominant trait.
If individuals II-1 and II-2 have a fourth child, what is the probability that the child will have dimples?
25%
50%
75%
100%
- 3. Multiple Choice
The pedigree tracks Duchenne Muscular Dystrophy (DMD) through several generations. DMD is an X-linked recessive trait.
If individuals I-1 and I-2 had another son, what is the chance that he would have DMD?
0%
25%
50%
100%
- 4. Multiple Choice
A boy is born with an extra finger on one hand. Extra digits are known to be common in members of the father's (and the father has 6 fingers as well) extended family, but not the mother's. The boy's two sisters have normal fingers. What is the most likely explanation?
X-linked inheritance, since only males are affected.
Y-linked inheritance: Males inherit from their fathers.
The extra finger trait is autosomal dominant.
A spontaneous mutation occurred.
- 5. Multiple Choice
Explain the inheritance of this rare trait in the pedigree.
The trait is X-linked recessive, inherited through the mothers.
The trait is autosomal recessive.
X-linked recessive.
The trait is autosomal dominant.
- 6. Multiple Choice
Explain the inheritance of this rare disease in the pedigree.
autosomal recessive
The trait is X-linked dominant.
The disease is inherited on the mitochondrial DNA.
- Answer choicesTagsAnswer choicesTags