Download Chapter 3 Study Guide

Name: ______________________________________
Date: ______________
Period: __________
Chapter 3 Study Guide
Answer the following questions using the materials from Chapter 3 in your notebook.
Remember, everything that is on your study guide will be on your Chapter 3 Test.
1. What are gametes?
2. What occurs during meiosis?
3. What is Genetics?
4. Who is the Father of genetics? What did he study?
5. Explain the difference between dominant and recessive traits.
6. What are genes? What are alleles?
7. Explain the difference between homozygous and heterozygous.
8. Explain the difference between genotype and phenotype.
9. What is a hybrid? What is true breeding?
10. What is Crossing over?
11. Cases in which one allele is not completely dominant over another.
12. Both alleles contribute to phenotype.
The problems that follow are NOT the exact problems that will be on the test, but are
the same kinds of problems that you will see. You should also review all of your other
Genetics problems that we have covered.
Trait
Dominant Phenotype Recessive Phenotype
Body color
Y = Yellow
y = Orange
Antennae number
A=2
a=1
Eyecolor
P = Purple
p = White
Eyesight
G = Glasses needed
g = No glasses
Number of Body Rings R = 3 rings
r = 5 rings
Given the following genotypes, tell what the phenotypes would be:
13. Rr: 3 rings
14. AA: 2 antennae
15. yy: orange body color
16. Pp: purple eye color
Given the following phenotypes, tell what the genotype(s) would be:
Name: ______________________________________
Date: ______________
Period: __________
17. Yellow body color: Yy, YY
18. No glasses needed: gg
19. 1 Antennae: aa
20. 3 Body Rings: Rr, RR
Complete the following Punnett Square problems:
21. A heterozygous yellow male mates with a homozygous yellow female.
a. Give the parents’ genotypes: YY, Yy
b. Complete the Punnett square:
c. What is the percentage chance that this couple will produce an orange baby?
0%
d. What percentage of the offspring would be homozygous? 50%
22. Two purple-eyed heterozygous aliens mate.
a. Give the parents’ genotypes: Pp, Pp
b. Complete the Punnett square:
c. What is the chance that this couple will produce a baby with white eyes? 25%
d. What percentage of the offspring would have the same phenotype as the
parents? 75%
23. Incomplete dominance: Complete the following cross RB X RB.
a. What is the percentage of red, blue and purple.