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Quiz: Pedigrees
By Marc Serrano
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Last updated almost 7 years ago
8 questions
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2
1
1
1
1
1
3
5
Question 1
1.
Question 2
2.
For a single gene, how many alleles does each parent pass on to each offspring?
Question 3
3.
How many grandchildren did I-1 and I-2 have?
Question 4
4.
How is III-2 related to III-4?
cousin
uncle
Question 5
5.
How many alleles does a person carry for each trait?
Question 6
6.
This pedigree tracks hemophelia in a family. How many of II-2's grandsons have hemophelia?
Question 7
7.
Question 8
8.
The pedigree below tracks the appearance of a recessive trait:
Match each individual on the left with the correct genotype on the right.
Dad
Mom
Sister
Which of the following individuals are carriers? (Choose ALL that apply)
III-2
II-2
I-1
IV-1
II-3
I-2
step-siblings
no relation
aunt
What are clues that a trait is recessive? (Choose ALL that apply)
can skip generations
you can be heterozygous and still be able to express the trait
you cannot be a carrier: you either have it or you don't
you can be a carrier for the trait
you must be homozygous in order to express the trait
shows up more often
Brother 1
Brother 2
Definitely homozygous dominant
Definitely heterozygous
Definitely homozygous recessive
Could be homozygous dominant or heterozygous