Pedigree Quiz - Winston-Salem/Forsyth County Schools
Pedigree Quiz
PLEASE use Mrs. Arias Guided Questions to help you make a PERFECT SCORE!!
Pedigree #1
1. Is this condition gender biased, why or why not? _________________________________________________________
_________________________________________________________
2. Is this condition dominant or recessive, why? _________________________________________________________
_________________________________________________________
3. Write out the alleles for the first, second and third generation offspring
in the circled area.
male alleles
| | |
| | |
| | |
| | |
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female alleles
4. For the circled pair, use the Punnett Square to determine the allele combinations that
are possible for each of this couple’s offspring.
Pedigree #2
1. Is this condition gender biased, why or why not? _________________________________________________________
_________________________________________________________
2. Is this condition dominant or recessive, why? _________________________________________________________
_________________________________________________________
3. Write out the alleles for the first, second and third generation offspring.
male alleles
| | |
| | |
| | |
| | |
| | |
| | |
female alleles
5. For the circled pair, use the Punnett Square to determine the allele combinations that
are possible for each of this couple’s offspring.
BONUS:
From the pedigree below, create a third generation using the son who is shaded. Give him a spouse who is not shaded along with 4 female children who are all shaded.
Answer the following questions concerning this modified pedigree.
1. Is this condition gender biased, why or why not?
2. Is this condition recessive or dominant, why?
3. Fill in the Punnett square for the son, his spouse and their children
male alleles
| | |
| | |
| | |
| | |
| | |
| | |
female alleles
4. Explain the percentages from the above Punnett square.
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