Advanced Biology Genetics Test
Name: ______________________________
Genetics Matching
1. d____ Co-dominance
a. traits that are more likely to be inherited together because
they are on the same chromosome
2. a ____Linked traits
b. States that one allele is dominant, or completely masks
(covers-up) the recessive allele
3. e____ Incomplete Dominance
c. States that alleles assort independently of one another. In
4. b____Principle of dominance
other words, an organism has equal chance of inheriting a
certain allele, regardless of what other traits it has inherited.
5. c____Law of Independent Assortment
d. The heterozygous phenotype displays both the
homozygous dominant & homozygous recessive
phenotypes.
e. The heterozygous phenotype shows up as a blend of
the homozygous dominant & recessive phenotypes. This is
because neither allele is completely dominant.
6. ____Gregor Mendel conducted his experiments on which organism?
a. pea plants
c. fruit flies
b. tortoises
d. finches
7. ____Gregor Mendel was a
a. doctor
b. monk
c. lawyer
d. professor
8. ____Gregor Mendel studied traits in the pea plant that displayed
a. co-dominance
c. simple dominance
b. multiple alleles
d. sex-linked traits
9. ____A gene is a
a. Region of DNA that codes for a protein
b. dominant allele
c. form of a trait
d. protein
10. ____We each have __________ copies of each of our chromosomes.
a. 1
c. 3
b. 2
d. 4
11. ____If two snapdragons are crossed, one with red flowers, one white flowers, and all the
resulting offspring have pink flowers, this is most likely an example of
a. co-dominance
c. simple dominance
b. incomplete dominance
d. multiple alleles
12. ____The color of a hydrangea flower is controlled both by genetics and by the pH of the soil
it is growing in. This is an example of a trait that is
a. controlled both by genetics and the environment
b. controlled by multiple alleles
c. controlled by multiple alleles AND genes
d. controlled by simple dominance
13. ____Which of the following shows the correct chromosome combination for a female?
a. XY
c. XXY
b. XX
d. XYY
14. ____Which of the sex chromosomes is larger? (Containing more genes?)
a. X
b. Y
15. ____Who would typically be more likely to inherit a recessive x-linked gene?
a. a male
b. a female
16. ____Dominant traits are always more common than recessive traits.
a. true
false
Punnett Square Problems
Simple Dominance
Use the following information & Punnett square set-up to answer questions 39-41.
T=tall
t=short
Use the following options to answer 18-21:
a. TT
b. Tt
c. tt
T
T
t
17.
TT
18. Tt
19.
TT
20. Tt
T
21. ____The parents crossed in the above Punnett square
a. are both tall
c. are both short
b. one is tall and one is short
d. both are of medium height
22. ____The genotype of the parents would be described as
a. both homozygous dominant
b. one homozygous dominant, and one homozygous recessive
c. both heterozygous
d. one homozygous dominant, and one heterozygous
23. ____There is a ___________% of chance of the offspring being tall.
a. 100
c. 50
e. 0
b. 75
d. 25
Dihybrid Cross
B=brown (not albino)
b=albino (white)
L=long tails
l= short tails
A female heterozygous (for both traits)BbLl lemming is bred with an albino male with a short
tail. bbll
Fill out the Dihybrid Cross in the Punnett square below & answer the following questions.
Filling out the Punnett square is worth 4 points.
BL
Bl
bL
A
bl
B
bl
bl
bl
24. What is the genotype in square A?
a. BBLL
c. BbLl
b. BBLl
d. bbLL
c. Bbll
e. bbll
25. What is the phenotype in square A?
a. brown with long tails
b. albino with long tails
c. brown with short tails
d. albino with short tails
26. What is the genotype in square B?
a. BBLL
c. BbLl
b. BBLl
d. bbLL
c. Bbll
e. bbll
27. What is the phenotype in square B?
a. brown with long tails
c. brown with short tails
bl
b. albino with long tails
d. albino with short tails
28. What percentage of the offspring will have the same phenotypes as the father?
a. 0%
c. 25%
e. 100%
b. 50%
d. 75%
29. If for your next batch of lemmings you do NOT want any albino offspring, which father
should you choose? (their genotypes are shows below)
a. BBll
c. BbLl
e. bbll
b. Bbll
d. bbLL
Multiple Alleles, Codominance, and incomplete dominance
30. If a mother has type A blood and a father has type O blood, what blood types could their
children have?
a. A only
b. O only
c. AB, A, B or O
d. A or O
31. Can an AB mother and an O father have a child with O blood type?
a. yes
b. no
32. Suppose you have two rose plants, both with pink flowers. You cross the two plants and are
surprised to find that, while most of the offspring are pink, some are red and some are white.
This must be an example of:
a. incomplete dominance
b. codominance
e. a sex-linked trait
c. multiple alleles
d. a polygenic trait
33. In the above example, what are the chances that the resulting plants have pink flowers?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
Sex-Linked Traits
34. Color-blindness is a recessive sex-linked trait. The gene for color-blindness is found on the X
chromosome only. What is the genotype for a male with colorblindness?
a. XBXB
b. XBXb
c. XbXb
d. XBY
e. XbY
35. What is the genotype of a color-blind male’s mother with normal vision?
a. XBXB
c. XbXb
e. XbY
b. XBXb
d. XBY
Carry out the cross between a color-blind male and a female carrier. 2 points for the Punnett
square
36. What are the chances that the daughters of the couple in the above cross will be color-blind?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
37. The below shows a family’s Pedigree for Hitchhiker’s Thumb. Is this trait
dominant or recessive?
a. dominant
b. recessive
38. Name the 2 individuals that were DEFINATELY
carriers of hitchhiker’s thumb.
a. 5 & 6
c. 7 & 8
b. 1 & 2
d. 12 & 13
39. Is it possible for individual 18 to be a carrier?
a. yes
b. no
40. How are individuals 10 & 11 related?
a. 2 is 13’s grandmother
b. 13 is 2’s neice
I
c. siblings
d. cousins
1.
II
III
9
IV
16
e. married
2
3
4
5
10
11
12
17
6
7
13
18
19
8
14
15
41-45. Draw a pedigree for the family below, showing which individuals are carriers by filling in
half of the circle or square.
A boy, whose parents and grandparents had normal vision, is color-blind. Use XB for the
dominant normal condition and Xb for the recessive, color-blind phenotype.
Bonus:
1. In a classic genetics experiment, such as those that Mendel conducted, the first generation of
plants (which are both homozygous) is called the…
a. F1 generation
c. P generation
b. F2 generation
d. G generation
2. What does the P for P generation stand for?
Parental
3. What does the F in the F1 & F2 generations stand for?
Filial
4. Name the scientist who first described linked genes
Thomas Hunt Morgan
5. What will be the least common phenotype in the dihybrid cross in your test (lemmings)?
a. brown with long tails
c. brown with short tails
b. albino with long tails
d. albino with short tails
6.Which of the following parental genotypes could have produced a rainbow litter of Labrador
retrievers (yellow, black, brown)?
P=pigment
B=black
p=no pigment (yellow)
b=brown
a.
b.
c.
d.
Yellow mother (ppBb) & black father (PpBB)
Yellow mother (ppbb) & brown father (Ppbb)
Black mother (PpBb) & brown father (Ppbb)
Brown mother (Ppbb) & yellow father (ppBB)