Name:
Date:
Genetics Study Guide
Use the information to write the phenotype for each item.
Characteristic
Dominant Gene
Body Shape
Triangle (S)
Body Color
Green (G)
Eye Shape
Round (R)
Nose Style
Short (N)
Recessive Gene
Round (s)
Purple (g)
Oval (r)
Long (n)
1. SS _______________
2. Rr _______________
3. nn _______________
4. Gg _______________
5. Ss _______________
6. Gg _______________
Use the information in the chart above to write the genotype for each trait
7. Triangle Shape _______________
8. Oval Eye Shape _______________
9. Purple Body _______________
10. Short Nose _______________
11. Round Eye Shape _______________
12. Long Nose _______________
Determine the genotypes for each using the chart above
13. Heterozygous triangle shape _______________ 14. Homozygous purple color _______________
15. Purebred green color _______________
16. Hybrid Short Nose _______________
Multiple Choice
_____ 17. A scientist crossed a purebred purple grape with a purebred green grape. Purple grapes are dominant over
green grapes. What is the probability that the offspring will have purple grapes? Create Punnett Square.
18. If two heterozygous parents are crossed, what are the possible genotypes that would result for their offspring? Create
Punnett Square.
a. all Bb
b. all bb
c. all BB
d. BB, Bb, and bb
19. If a hybrid pink flower were to be crossed with a green flower, what would the probability of each phenotypes be for
their offspring? Create Punnett Square.
Use the following information to answer the questions below.
Oompah Loompahs have orange faces, which is caused by a dominant gene (T). The recessive condition results in a lime
face (t). Create Punnett Squares.
21. If two heterozygous Oompah Loompahs with orange faces are crossed:
a. What is the probability their offspring will have orange faces? _____
b. What is the probability their offspring will have lime faces? _____
22. If a homozygous recessive Oompah Loompah is crossed with a heterozygous Oompah Loompah:
a. What is the probability their offspring will have orange faces? _____
b. What is the probability their offspring will have lime faces? _____
23. If a hybrid Oompah Loompah is crossed with a purebred orange faced Oompah Loompah:
a. What is the probability their offspring will have orange faces? _____
b. What is the probability their offspring will have lime faces? _____