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Biology 30
Module 3
Assignment 13
Copyright: Ministry of Education, Saskatchewan
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Biology 30
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Assignment 13
Biology 30
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Assignment 13
Biology 30
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Assignment 13
Biology 30
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Assignment 13
Assignment 13
Values
(20)
A.
Multiple Choice: Select the best answer for each of the following and
place a check () beside it.
1.
2.
In humans, the sex of an offspring is actually determined by ***.
____
____
____
a.
b.
c.
____
d.
A woman whose father had hemophilia and whose mother was
normal, married a man whose father was normal and whose
mother had hemophilia. If their first child was a son, there would
be a *** chance that he would show the trait of hemophilia.
____
____
____
____
3.
0%.
25%.
50%.
100%.
a.
b.
c.
d.
Colorblindness.
Hemophilia.
Baldness.
Down's Syndrome.
Dr. Karl Landsteiner is primarily associated with ***.
____
____
____
____
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a.
b.
c.
d.
The human condition *** develops as a result of nondisjunction.
____
____
____
____
4.
the female's sex chromosomes
the male's sex chromosomes
either the female or the male, depending upon which is
stronger or more healthy at the time of conception
the body chromosomes of both the female and male
a.
b.
c.
d.
the one gene-one protein concept
blood types
sex-linkage
chromosome maps
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Assignment 13
5.
If there is a high frequency of cross-over between two genes, it is
likely that these genes ***.
____
____
____
____
6.
a.
b.
c.
d.
show possible abnormalities in chromosomes
illustrate the lengths and shapes of chromosomes
establish chromosomes as homologous pairs
establish the locations of genes on chromosomes
a.
b.
c.
d.
2
3
4
6
A blood type which is always an indication of a heterozygous
condition is type ***.
____
____
____
____
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useful to humans
useful to organisms
either harmful or of no use to the organisms
neither useful nor harmful to organisms
There are three alleles present for a certain trait. Two of these are
codominant with each other and the third allele is recessive to both
codominants. The total number of phenotypes possible for the
trait is ***.
____
____
____
____
9.
a.
b.
c.
d.
The main purpose of gene maps is to ***.
____
____
____
____
8.
are far apart on the same chromosome
are close together on the same chromosome
experience more mutations in either one or the other
occupy similar positions on different chromosomes
Most mutations are ***.
____
____
____
____
7.
a.
b.
c.
d.
a.
b.
c.
d.
A
B
AB
O
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Assignment 13
10.
*** percent of sons from a carrier female and a colorblind male can
be expected to be colorblind.
____
____
____
____
11.
a.
b.
c.
d.
0%.
25%.
50%.
100%.
Mutant genes very often do not express themselves for many
generations. This is because ***.
____
____
a.
b.
____
____
c.
d.
gene mutations happen very infrequently
most gene mutations are lethal and kill the offspring
before birth
many gene mutations are recessive
gene changes will not appear until environmental
conditions are just right
12.
The preceding graphic shows a human pedigree involving blood
type. One daughter has a known blood type of AB and one son has
a known blood type of O. The genotypes of the parents are likely
***.
____
____
____
____
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a.
b.
c.
d.
IAi, IAIB
ii, IAIB
I AI A, I BI B
IAi, IBi
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Assignment 13
13.
14.
The main characteristic of the fruitfly, Drosophila, which makes it
suitable for genetic studies is that ***.
____
a.
____
____
____
b.
c.
d.
A male mammal carrying a sex-linked gene on the X chromosome
would transmit this gene to ***.
____
____
____
____
15.
17.
one-half of his female offspring
one-half of his male offspring
all of his female offspring
all of his male offspring
a.
b.
c.
d.
roan cattle
tall and short garden peas
human ABO blood types
human skin color
An actual gene is considered to be ***.
____
a.
____
b.
____
____
c.
d.
three nitrogen bases in a DNA molecule which code a
specific amino acid
a series of codons which direct the formation of one
complete protein
messenger RNA, which carries out the "orders" of DNA
all the DNA bases in one "twist" of the DNA helix
Genes responsible for alternate expressions of one particular trait
are known as ***.
____
____
____
____
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a.
b.
c.
d.
An example of polygenic inheritance is that of ***.
____
____
____
____
16.
it does not usually experience mutations to confuse
results
it is quite small
it has a very short life cycle
the different sexes are similar in size
a.
b.
c.
d.
genotypes
phenotypes
polygenes
alleles
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Assignment 13
18.
People who have red hair generally have freckles as well. This can
best be explained by ***.
____
____
____
____
19.
a.
b.
c.
d.
fertile female
female not likely to survive into adulthood
sterile female
sterile male with feminine traits
If a "strange" nucleotide is inserted into a certain spot in a DNA
chain, it results in a(n) ***.
____
____
____
____
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linkage
independent assortment
codominance
polyploidy
A human with the sex chromosome combination XXX would
probably be a ***.
____
____
____
____
20.
a.
b.
c.
d.
a.
b.
c.
d.
inversion
chromosomal mutation
multiple allele formation
frameshift mutation
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Assignment 13
(8)
B.
Matching: In the space provided in front of each item in Column A,
write the letter of the correct answer from Column B.
Column A
____
C.
(3)
1.
Column B
shows the location of genes
on a chromosome
____
2.
universal donor
____
3.
Beadle and Tatum
____
4.
changes to one or two bases
in a sequence
____
5.
name given to chromosomes
other than sex chromosomes
____
6.
universal recipient
____
7.
used to clone DNA fragments
to hi-lite genetic markers in
a genome
____
8.
phenotypes affected by the
cumulative effect of two to
five different pairs of genes
a.
autosomes
b.
gene map
c.
polymerase chain
reaction
d.
polygene
e.
one gene produces
one protein
f.
type O blood
g.
point mutation
h.
type AB blood
Short Answer
1.
Identify the type of chromosomal mutation in each of the following:
a.
____________________
b.
____________________
c.
____________________
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(10)
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2.
Indicate the purpose of each of the following:
a.
A chorionic villi biopsy.
b.
A Punnett Square.
c.
A pedigree.
d.
A karyotype.
e.
A plant breeder administering colchicine to certain plant
cells.
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Assignment 13
(12)
3.
a.
b.
c.
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i.
Briefly indicate two ways in which gene mutations can
occur.
ii.
Briefly indicate two ways in which chromosomal
mutations can occur.
i.
What are mutagens? (The general meaning.)
ii.
List four possible mutagens.
In what way could mutations be valuable from the viewpoint
of an entire species?
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Assignment 13
(8)
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4.
Blood typing is sometimes used to determine the identities of
possible parents of certain children. In each of the following two
examples, both the mother's and the child's blood types are
known. The blood types of two possible fathers are given in each
situation. Identify the likely father of the child in each case. State
the reasoning for your decision. (Show your work)
a.
The mother belongs to type B, the child to O. One possible
father is type A and the other is type AB.
b.
The mother belongs to type B, the child to AB. One possible
father is type A and the other is B.
c.
A person of blood group AB marries one belonging to group
O. Use a Punnett Square to show the probable blood types
of their children.
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Assignment 13
(9)
5.
a.
In the section on sex-linkage in this lesson, a pedigree or
chart tracing colorblindness in several family generations
was presented. Using XC to represent a chromosome
carrying a gene for normal vision and Xc to represent a
chromosome with a gene for colorblindness, identify the
numbered individuals in the chart.
Beside each number, identify the most probable genotype of
the individual having the same number in the preceding
chart. (Be sure the sizes of the c's give an indication of
whether they are capital or lowercase.)
Individual 1 ____________________
Individual 2 ____________________
Individual 3 ____________________
Individual 4 ____________________
Individual 5 ____________________
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Assignment 13
b.
(9)
6.
In the following human pedigree, the hachured (or partially
shaded) individuals are those displaying a particular trait. Nonhachured or clear individuals do not show the trait.
a.
Biology 30
In the preceding example, if individual 3 had the same
genotype as individual 1, what differences (if any) could you
have seen in individual 3's two sons? Give a reason for your
answer.
State the reasoning that you would use to explain why the
particular trait is not sex-linked. (If you wish, you may use
the numbers of individuals to assist in your explanation.)
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Assignment 13
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b.
What manner of inheritance does the trait follow and briefly
give the reason.
c.
Suppose individual #6 was carrying and showing a sexlinked trait. Set up a pedigree chart with individuals 6 to 10,
showing what changes (if any) should occur with 8, 9 and
10. If there are changes, or no changes, indicate the
reasons.
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Assignment 13
(6)
(4)
8.
7.
Explain the significance of the Rh protein factor in human blood.
a.
What inheritance pattern is indicated in the pedigree below for
colorblindness? (Inheritance pattern could refer to such
combinations as: dominant-recessive, codominance, incomplete
dominance, sex-linkage …)
Inheritance pattern:
b.
_________________________________________
Explain your reasoning for choosing that pattern.
Use this pedigree to answers questions 8 and 9.
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Assignment 13
Refer to the pedigree in question 8 to answer the following question.
(11)
9.
a.
Establish the letters that you wish to use to express normal vision
and colorblindness. (Show the traits on the X chromosome.)
Normal vision: ____________________
Colorblindness: ____________________
b.
Using the letters you have chosen in (a), indicate the probable
genotypes of the following individuals:
I-1
_________________
I-2
_________________
II-1
_________________
II-2
_________________
II-3
_________________
II-5
_________________
II-6
_________________
III-2 _________________
III-5 _________________
_____
(100)
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