Name_________________________Date_______________________ Score____________/100
Genetics Test
Multiple Choice: Select the capital letter of the MOST correct answer.
1. ____Where are the genes for sex-linked traits in vertebrate organisms
located?
A. They can be on any chromosome
B. On the Y Chromosome
C. On the X Chromosome
D. On Chromosome Pair #10
2. ____When a white flower(R) is crossed with a red flower (R’) it produces
pink offspring. This is an example of Co-dominance. If two pink-flowered
plants are crossed, what ratio will the geneotypes of the offspring be?
A. 1 RR: 3Rr
B. 1 RR: 2Rr’:1R’R’
C. 2 RR:2RR’
D. 1 RR:1RR’1R’R’
3. ____If a dominant allele for a trait and a recessive allele are present in an
organism which allele is expressed?
A. Pure
B. Phenotype
C. Recessive
D. Dominant
4. ____What do a tall pea plant (TT) and a tall pea plant (Tt) have in common?
A. Phenotype
B. Genotype
C. Seed color
D. Parents
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5. ____When crossing pure breeding pea plants Mendel noted that some genes
were not seen in the F1 generation and were seen in only 25% of the F2
generation. What did he call these genes?
A. Dominant
B. Recessive
C. Lethal
D. Incompletely dominant
6. ____A dairy farmer notices that a cow in his herd is a good producer of milk
but does not have offspring with this trait. How does Mendelian inheritance
explain this situation? The cow has
A. Recessive genes for high milk production that are not expressed in her
offspring.
B. Recessive genes for high milk production that are not being passed to
her offspring.
C. Dominate genes for high milk production that are not expressed in her
offspring.
D. Dominant genes for high milk production that are not being passed to
her offspring.
7. ____A Punnett Square is used to determine the ….?
A. Result of Mitosis
B. Probable outcome of a cross
C. Result of Meiosis
D. Actual outcome of a cross
8. ____If a homozygous tall pea plant (dominant) and a homozygous short pea
plant are crossed…?
A. The recessive trait seems to disappear
B. The offspring are of medium height
C. No hybrids are produced
D. All the offspring are short.
9. ____Organisms that have two identical alleles for a particular trait are said
to be…?
A. Hybrid
B. Heterozygous
C. Homozygous
D. Dominant
Name_________________________Date_______________________ Score____________/100
10. The physical characteristics of an organism are its…?
A. Genetics
B. Heredity
C. Phenotype
D. Genotype
11. Two pink flowering plants are crossed. The offspring are as follows 25%
red, 25% white, and 50% pink. What pattern of inheritance does flower
color follow?
A. Dominance
B. Incomplete Dominance
C. Recessive
D. Co-dominance
12. Brown eyes in humans are dominant to blue eyes. A brown-eyed man,
whose mother was blue-eyed, marries a brown-eyed woman whose father
had blue eyes. What is the probability that this couple will have a blue-eyed
child?
A. 100%
B. 75%
C. 50%
D. 25%
Use the picture for the following 5 questions.
13. What is the dominant phenotype?
A. 1 Fin
B. 2 Fins
C. Red Fin
D. Blue Fin
Name_________________________Date_______________________ Score____________/100
14.What is the recessive phenotype?
A. 1 Fin
B. 2 Fins
C. Red Fin
D. Blue Fin
15. What are the Genotypes of the two parent fish?
A. FF
B. Ff
C. ff
D. ??
16.How many baby fish have the Dominant phenotype?
A. 1
B. 2
C. 3
D. 4
17.How many baby fish have the recessive phenotype?
A. 1
B. 2
C. 3
D. 4
Please use the picture for the following 4 questions
18.What is the dominant phenotype?
A. Scarf
B. No scarf
C. Horns
D. No horns
Name_________________________Date_______________________ Score____________/100
19.What is the recessive phenotype?
A. Scarf
B. No scarf
C. Horns
D. No horns
20.What is the genotype of the yeti parent on the left?
A. PP
B. Pp
C. pp
D. ??
21.What is the most probable genotype of the yeti parent on the right?
A. PP
B. Pp
C. pp
D. ??
True or False Please mark each of the following questions True or False.
22._____Certain acquired characteristics, such as mechanical or mathematical
skill, may be inherited.
23.______The father determines the sex of the child.
24.______Each parent contributes half of a child's genetic make-up.
25.______A person may transmit characteristics to offspring that is not present
in that person.
26.______The tendency to produce twins may run in families.
27.______The parent with the stronger will contributes more to a child's
inheritance than the other parent.
28.______If a person loses a limb in an accident; it is likely that he or she will
have a child with a missing limb.
29.______The total number of male births exceeds female births each year.
30.______Gregor Mendel is considered the father of genetics
Name_________________________Date_______________________ Score____________/100
Please match the words on the left with the correct definition on the right.
31. Incomplete dominance
Genotypes made of the same alleles
32. Co-dominance
Different forms of genes for a single
trait
33. Sex linked traits
Genetoypes made of two different
alleles
34. Hybrid Vigor
Gene that is always expressed
35. Law of segregation
Gene that is expressed only in the
homozygous state
36. Law of independent assortment
Traits that show up depending on
Gender
37. Alleles
Neither trait is completely dominant
over the other. Both traits mix
together(usually colors,
red/white=pink)
38. Dominant
Two pure breed animals from different
breeds are crossed resulting in
offspring with the advantages from
each breed
39. Heterozygous
All alleles must sort so that each
organism gets one allele from each
parent
40. Homozygous
Neither trait is completely dominant
over the other both traits show up.
(Splotches or spots)
41. Recessive
All alleles sort independently of one
another.