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Ch. 12: Patterns of Heredity & Human Genetics Quiz
DO NOT WRITE ON THIS QUIZ!!! WRITE ON YOUR OWN PAPER!!!
MULTIPLE CHOICE Choose the correct letter to answer the question.
1. _______________ is when the alleles of both homozygous dominants are mixed together so that
the heterozygous individual shows a phenotype between the two.
A. codominance
B. inheritance
C. incomplete dominance D. dominant
2. Which of the following would a pedigree not be able to show you?
A. family relationships
B. age
C. male or female D. individual affected by trait
3. _______________ is when the alleles of both homozygous dominants are expressed equally in
the heterozygous individual.
A. codominance
B. inheritance
C. incomplete dominance D. dominant
4. Chromosomes 1 – 22 are _____________.
A. sex chromosomes B. homozygous
C. autosomes
D. gametes
5. _______________ is when a trait is controlled by many genes.
A. x-linked
B. codominance
C. sex-linked traits D. polygenic inheritance
6. This disorder does not occur until 30-50 years of age.
A. Tay-Sachs
B. sickle cell
C. Huntington’s
7. Tay-Sachs can cause death at the age of
A. 2
B. 4
C. 6
D. Down’s syndrome
D. 8
TRUE or FALSE Determine if the following statements are true or false. Write true or false.
8. Eye color and height are examples of polygenic inheritance.
TRUE/ FALSE
9. Y-linked disorders are passed from father to daughter.
TRUE / FALSE
10. Cystic fibrosis is a recessive disorder that causes mucus build up
.
TRUE / FALSE
11. In a pedigree, a carrier is represented by a fully shaded shape.
TRUE / FALSE
12. Sex chromosomes are the 25th pair in humans.
TRUE / FALSE
13. X-linked disorders are passed down from mother to son.
TRUE / FALSE
SHORT ANSWER List 5 of the 8 environmental factors that can influence gene expression.
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15.
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17.
18.
FILL IN THE BLANK Label the following chart of symbols from a pedigree
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24. In order to inherit a recessive disorder, what has to happen?
25. In order to inherit a dominant disorder, what has to happen?
Bonus Questions
B1. Name a recessive disorder.
B4. Name a dominant disorder.
B2. Name a X-linked disorder.
B5. Name a chromosomal disorder.
B3. Name a dominant trait.