Genetics Unit Study Guide
1. Write the vocabulary word for each definition.
a. A “hidden” trait. You need two to experience this inherited trait. ___________________
b. A condition in which the alleles of a gene pair are fully expressed thereby resulting in
offspring that is neither dominant nor recessive. ________________________________
c. A form of intermediate inheritance in which one allele for a specific trait is not
completely dominant over the other allele. ____________________________________
d. A form of reproduction that does not involve fertilization, and the offspring is a clone of
the parent organism._____________________________________________________
e. A form of reproduction that involves fertilization. The offspring is a mix of the parent
organisms because of shared DNA. __________________________________________
f.
One member of a pair of genes which control the same trait.______________________
g. Organisms which are genetically identical. ____________________________________
h. These may arise from faulty deletions, insertions, or exchanges in the genetic material,
as caused by exposure to radiation, chemicals, viruses, etc. Such a change may result in
the creation of a new character or trait._______________________________________
i.
Two different alleles for the same characteristic.________________________________
j.
Two of the same allele for a characteristic._____________________________________
k. You only need one allele of this trait to have the inherited trait.____________________
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Allele
Asexual
Reproduction
Carrier
Cell Division
Characteristic
Chromosome
Clone
Co-Dominance
DNA
Dominant
Gene
Heterozygous
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Word Bank
Homozygous
Incomplete
Dominance
Inherited
Mutation
Pedigree
Probability
Punnett Square
Random
Recessive
Sexual
Reproduction
Trait
2. Using the Pedigree above, answer the following questions:
a. Is the condition (represented with the darker symbols) most likely a dominant or a
recessive trait? Explain.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
b. Is Marcus most likely to be homozygous dominant, homozygous recessive, or
heterozygous? Explain.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
3. The Moore police are looking at some suspects for various robberies in town. Each crime had
blood left at the scene. They have collected the blood of each suspects’ parents to compare
against the crime scene blood. Which suspect could have committed which crime? (SHOW YOUR
WORK!!!)
Crime Scene
Scene 1
Scene 2
Scene 3
Scene 4
Suspect A’s Parents
Jean
Frank
Suspect B’s Parents
Lucy
Bob
Blood Found
A
AB
A
O
Rh Factor
+
+
-
Blood Type
O
A
Blood Type
B
A
Rh Factor
+
Rh Factor
+
-
Create Punnett squares based on the scenario given and state the results.
4. R= normal retina
r= abnormal retina
A male Rr and a female RR want to know what allelic combinations their child could have.
5. M= normal joint gene
m= Marfan syndrome gene
A male MM and a female mm want to know what allelic combinations their child could have.
6. H: Tall gene (dominant)
h: short gene (recessive)
A male Hh and a female Hh want to know what allelic combinations their child have.
7. P= purple flower
p= white flower
A male PP and a female pp are combined. What allelic combinations could their offspring have?
8. P= purple flower
p= white flower
A male Pp and a female pp are combined. What allelic combinations could their offspring have?
9. P= purple flower
p= white flower
A male Pp and a female Pp are combined. What allelic combinations could their offspring have?
10. P= purple flower
p= white flower
A male PP and a female pp are combined. What allelic combinations could their offspring have?
11. A male with AO blood alleles and a female with AB blood alleles are combined. What allelic
combinations could their offspring have?
12. A male with AA blood alleles and a female with BO blood alleles are combined. What allelic
combinations could their offspring have?
13. A male with AB blood alleles and a female with OO blood alleles are combined. What allelic
combinations could their offspring have?
14. A male with AA blood and a female with AB blood are combined. What allelic combinations
could their offspring have?
15. Name three things about meiosis that are different from mitosis.
16. Each of these is an onion cell going through mitosis. Label which phase each cell is in. (PMAT and
don’t forget interphase)
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10
2
11
3
12
4
13
5
14
6
15
7
16
8
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