Download Pedigree Practice: Pre Test

Pedigree Practice: Pre Test
Name
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Next Generation Sunshine State Standards: SC.912.l.16.1 Use Mendel's
of segregation
assortment to
SC.912.l.16.2 Discuss observed inheritance patterns caused by various modes
are
and sex-linked,
and
patterns dominant and recessive
1. A "family tree" diagram showing the heritable traits of parents to offspring through a number of
generations is called a - - - - - - - - - ­
A. "probability tree"
B. genotype
C. pedigree
D. phenotype
2.
Which of the following makes this statement true? "Most human genetic disorders are caused
by~~~~~~~~~~-
A. recessive genes.
B. a dihybrid cross.
C. dominant genes.
D. incomplete dominance.
3. An individual is considered a "carrier" for a recessive disorder if they have- - - - - - - for
the trait.
A. homozygous alleles for the trait
B. heterozygous alleles for the trait
C. more than one allele for a trait
D. parents who exhibit the disorder
4. Which symbol in a pedigree would be used to represent an affected male for a certain disorder?
A.
B.
c.
D.
5. The first generation father in the diagram below has a dominant genetic disorder. Which of the
following is his genotype?
A. RR
B. Rr
C. rr
D. Both Rr and RR are possibilities
6. Carol's father has homozygous alleles for the dominant feature of having dimples. Her mother
also has dimples, but carries the recessive gene for no dimples. What is the probability that
Carol will have dimples?
A. 0%
B. 25%
c. 50%
D. 100%
Use the information about a real family from Martha's Vineyard, an island off the coast of
Massachusetts in which deafness was inherited to answer questions #7-12.
Joshua
Abigail
John
Hepzibah
I.
Dd
Dd ?
II.
D?
Abbie
Ill. dd
Jonathan
D
Dd
Elizabeth
?
7. Which of the above named individuals could be classified a "purebred"?
A. Joshua
B. Abigail
C. Jonathan
D. Elizabeth
8. Complete the Punnett Square below to help you determine the answer for question #8 .
!
0
d
DD
0
I
d
I
i
i
I
I
9. What is the probability (use percentage) that Abbie is a carrier the recessive gene for deafness?
A. 0%
B. 25%
c. 50%
D. 75%
10. Which of the following would not be possible allele combinations for Elizabeth's parents, John
and Hepzibah?
A. DD and dd
B. Dd and Dd
C. dd and Dd
D. DD and DD
11. We do not know the genotype for Elizabeth's parents, John and Hepzibah. We do know that
A. one of them must be deaf.
B. neither of them has the allele for deafness, as both have the ability to hear.
C. even though they both hear, at least one of them must have an allele for deafness.
D. neither of them has homozygous alleles for deafness.
12. What is the probability that Jonathan and Elizabeth's children have a homozygous allele for
hearing?
A. 0%
B. 25%
c. 50%.
D. 100%
13. Which of the following statements is true?
A.
Most of the human genetic disorders are dominant.
B.
A population that is isolated will be likely to have a higher frequency of a disorder.
C.
To display a dominate feature, an individual must have homozygous alleles.
D. Dominant disorders are lethal (deadly), while recessive disorders are not.
14. Edward is found to be heterozygous (Dd) for diabetes. The alleles represented by the letters D
and dare
A. on the X and Y chromosomes.
B.
linked.
C.
on homologous chromosomes
D. on the same chromosome, but far apart.
15. Which of the following disorders is caused by a recessive trait?
A.
Diabetes
B.
Dark eye color
C.
Tongue rolling
D. Widow's peak hairline
16. In the diagram below, what do we know about the female Ill #1?
A. She was homozygous dominant.
B.
She is a carrier of the trait.
C.
She was homozygous recessive.
D. She had the trait.
I
fl
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IV