Name: _____________________
Dragon Genetics Answer Document
1. Draw the mother and father dragons on your answer sheet.
2. Draw a Punnett Square to show the inheritance of the horn alleles for a mating between this mother and father
3. On average, what fraction of the baby dragons will have big horns?
Two equally
probable
chromosome
arrangements in
Meiosis I:
Meiosis II:
Gametes
Genotypes
w h
Father
(wwhh)
w H
W h
W H
zygote
zygote
zygote
zygote
Genotype of
baby =______
Genotype of
baby =______
Genotype of
baby =______
Genotype of
baby =______
Phenotype:
Phenotype:
Phenotype:
Phenotype:
w h
6. Considering only the baby dragons with wings, what fraction do you expect to have big horns? (To answer this
question, it may be helpful to begin by shading in the two columns of the above Punnett square that include all
the baby dragons with wings.)
7. Considering only the baby dragons without wings, what fraction do you expect to have big horns?
8. Do you expect that baby dragons with wings and without wings will be equally likely to have big horns?
9. Why?
Father
(wwhh)
Mother (WwHh)
wh
Genotype of baby =
wwhh
wH
Genotype of baby =
wwHh
Wh
Genotype of baby =
Wwhh
WH
Genotype of baby =
WwHh
Number of babies
with this genotype
=____
Number of babies
with this genotype
=____
Number of babies
with this genotype
=____
Number of babies
with this genotype
=____
Phenotype:
Wings ____
or No wings ___
Horns Big _____
or Small _____
Phenotype:
Wings ____
or No wings ___
Horns Big _____
or Small _____
Phenotype:
Wings ____
or No wings ___
Horns Big _____
or Small _____
Phenotype:
Wings ____
or No wings ___
Horns Big _____
or Small _____
wh
11. Do any of the baby dragons with wings have small horns?
12. Does either parent have the combination of wings and small horns?
13. How did this new combination of characteristics (wings and small horns) arise in some of the baby dragons?
(Your answer will include events during meiosis and fertilization, so you may find it helpful to review the
diagram of meiosis on page 1 and the chart of fertilization on page 2.)