Broward Community College Genetics Blood Type Critical Thinking and Worksheet Need help with two papers.One is Critical Thinking the other is Worksheet.Ans

Broward Community College Genetics Blood Type Critical Thinking and Worksheet Need help with two papers.One is Critical Thinking the other is Worksheet.Answers in red color.Due July 12 Name_______________________
Genetics Questions
1. A pure breeding pea plant with green peas was crossed with a pure breeding plant with yellow
peas. In the F1 generation, all the plants had yellow peas.
a. Write the cross, including genotypes, between the P individuals, and indicate the
genotype of the F1.
b. If an F1 is crossed back with the green parent, what phenotypes and genotypes, and in
what proportions, will be seen in the offspring?
c. If the F1 progeny are self-crossed, what will be the phenotypes (and proportions) in the F2
generation?
2. A genetics student is breeding fruit flies in the lab. One strain of flies has normal (long)
wings, while another strain has vestigial (short) wings. When the student crosses normal
long winged flies with vestigial flies, she finds that all of the progeny have long wings.
When she allows the long winged F1 flies to mate, she examines the resulting offspring, all
1,172 of them! How many of the flies would you predict will have long wings, and how
many will have vestigial wings?
3. A tall, purple flowered pea plant has the genotype TtPp. It is crossed with a tall, white
flowered plant with the genotype Ttpp. Recall that tall is dominant to short and purple is
dominant to white. Determine the phenotypes and their respective proportions in the
offspring.
4. Blood type can often be used to include or exclude potential fathers in a paternity case.
Suppose a woman with blood type A has a child with blood type O. Four potential fathers
and their blood types are listed below. Provide possible genotypes for all parties and
determine whether or not this blood typing can exclude any of the men as the father.
Child: blood type O
Mother: blood type A
George: blood type A
Billy: blood type B
Dave: blood type AB
Frank: blood type O
5. Colorblindness is an X-linked recessive condition in humans. A woman with normal vision,
whose father was colorblind, marries a colorblind man. Diagram the cross and determine the
genotypes and phenotypes of their children.
6. Faulty enamel is an X-linked dominant condition that causes severe tooth decay in humans.
A man with this condition marries a woman who has normal teeth. What can you say about
the daughters resulting from this marriage? What about the sons?
7. Consider the genetics of comb shape in chickens. In the following crosses, indicate the
phenotypes of the parents, and show the genotypes and determine the phenotypic ratios of the
progeny:
a. RRPp X rrPp
b. rrPP X RrPp
c. rrpp X RrPp
8. In Shorthorn cattle the heterozygous condition of the alleles for red coat color (R) and white
coat color (r ) is roan (Rr) coat color, an incomplete dominant situation. If two roan cattle are
mated, what proportion of the progeny will resemble their parents in coat color?
Name ________________________
Date ________________________
Course/Section _______________________
Professor ________________________
The Chromosomal Basis of Inheritance
1. Based on the results of this cross, you can determine that _____ .
a. Round Eyes/Absence of a Tooth are Dominant to
vertical eyes/presence of a tooth
b. Round Eyes/Presence of a Tooth are Dominant to
vertical eyes/absence of a tooth
c. The allele for round eyes is linked to the
allele for no tooth
d. Vertical Eyes/Presence of a Tooth
are Dominant to round eyes/absence
of a tooth
e. Vertical Eyes/Absence of a Tooth
are Dominant to round eyes/presence
of a tooth
2. The results of the following cross indicates that _____ .
a. Presence of a Tooth
is Dominant to the
absence of a tooth
b. The 2
genes are linked
c. MendAlien species are polyploid
d.
Vertical Eyes are Dominant to roun
eyes
e. The 2 genes assort
independently
3. The below F1
Heterozygous
individual (VvTt) can
produce _____
different gametes
when both eye and
tooth genes are
considered. List the possible gametes.
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Campbell/Reece Biology, Sixth Edition, © Pearson Education, Inc., publishing as Benjamin Cummings
95
a. 1
b. 2
c. 3
d. 4
e. 5
4. Given the 2 chromosomes below, which of the choices represents the possible ‘recombinant gametes’?
a.
b.
d.
c.
e.
5. The results of a F1 testcross of linked genes are: 250 bald head, four ears : 247 hairy head, six ears : 21 bald head, si
ears : 19 hairy head, four ears. How many map units apart are the head and ear genes?
a. 3.5
b. 3.9
c. 7.5
d. 50.5
e. 92.6
6. Which of the individuals below is homozygous recessive for both genes?
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Campbell/Reece Biology, Sixth Edition, © Pearson Education, Inc., publishing as Benjamin Cummings
96
a. The female parent
b. The male parent
c. The F1 generation
d. Both the male and female parents
e. The F2 generation
7. The results of the following cross indicates that the _____ .
a. Absence of a Tooth is Dominant to the presence of a tooth
c. MendAlien species are aneuploid
e. These 2 genes assort independently
b. Two genes are linked
d. Vertical Eyes are Dominant to round eyes
8. The recombination frequency between gene A and gene B is 8.4%, the recombination frequency
between gene A and gene C is 6.8%, and the recombination frequency between gene B and gene C is
15.2%. Which of these is the correct arrangement of these genes?
a. ABC
b. ACB
c. BCA
d. CAB
e. CBA
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Campbell/Reece Biology, Sixth Edition, © Pearson Education, Inc., publishing as Benjamin Cummings
97
9. A Color-Blind woman mates with a male with Normal Color vVsion. Which of these results would
indicate that color blindness is caused by an X-linked recessive allele?
a. Half of the sons and half of the daughters are color-blind.
b. All of the daughters, and none of the sons, are color-blind.
c. All of the sons, and none of the daughters, are color-blind.
d. The offspring occur in a ratio of 3 color-blind : 1 normal vision.
e. The offspring occur in a ratio of 9 normal vision males : 3 color-blind vision males : 3 normal vision
females : 1 color-blind female.
10. Color blindness is an X-linked recessive trait. A color-blind man has a daughter with Normal Color
Vision. What is the genotype of the daughter?
a. XCXc
d. XCY
b. XCXC
e. XcY
c. XcXc
11. Color blindness is an X-linked recessive trait. A color-blind man has a daughter with Normal Color
Vision. She mates with a male who has Normal Color Vision. What is the expected ‘phenotypic ratio’ of
their offspring?
a. 1 normal vision female : 1 color-blind female : 1 normal vision male : 1 color-blind male
b. All the offspring have normal color vision.
c. 2 normal vision females : 1 normal vision male : 1 color-blind male
d. 3 normal vision female : 1 color-blind male
e. 1 normal vision female : 1 color-blind male
12. Color blindness is an X-linked recessive trait. A color-blind man has a daughter with Normal Color Vision.
She mates with a color-blind male. What is the expected ‘phenotypic ratio’ of their offspring?
a. All the offspring have normal color vision.
b. 2 normal vision females : 1 normal vision male : 1 color-blind male
c. 3 normal vision female : 1 color-blind male
d. 1normal vision female : 1 color-blind female : 1 normal male : 1 color-blind male
e. 1 normal vision female : 1 color-blind male
13. Color blindness is an X-linked recessive trait. A woman who is homozygous for normal color vision
mates with a color-blind male. What is the expected ‘phenotypic ratio’ of their offspring?
a. 2 normal vision females : 1 normal vision male : 1 color-blind male
b. 3 normal vision female : 1 color-blind male
c. All the offspring have normal color vision, but 2 females are carriers
d. 1 normal vision female : 1 color-blind female : 1 normal male : 1 color-blind male
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Campbell/Reece Biology, Sixth Edition, © Pearson Education, Inc., publishing as Benjamin Cummings
98
e. 1 normal vision female : 1 color-blind male
14. Color blindness is an X-linked recessive trait. A color-blind woman mates with a male with Normal
Color Vision. What is the expected ‘phenotypic ratio’ of their offspring?
a. 1 normal vision female : 1 color-blind female : 1 normal male : 1 color-blind male
b. 1 normal vision daughter : 1 color-blind son
c. 2 normal vision females : 1 normal-vision male : 1 color-blind male
d. 3 normal vision female : 1 color-blind male
e. All the offspring have normal color vision.
15. Color blindness is an X-linked recessive trait. Under what conditions can an unaffected male have a
color-blind daughter?
a. His mate is color-blind.
d. His mother is color-blind.
b. He is heterozygous for color vision.
e. He can’t.
c. His father is color-blind.
16. Hypophosphatemia (vitamin D-resistant rickets) is inherited as an X-linked Dominant. An unaffected
woman mates with a male with hypophosphatemia. What is the expected ‘phenotypic ratio’ of their
offspring?
a. 1 normal female : 1 female with hypophosphatemia : 1 normal male : 1 male with hypophosphatemia
b. 1 normal daughter : 1 son with hypophosphatemia
c. 1 daughter with hypophosphatemia : 1 normal son
d. 2 normal females : 1 normal male : 1 male with hypophosphatemia
e. 3 normal female : 1 male with hypophosphatemia
17. Hypophosphatemia (vitamin D-resistant rickets) is inherited as an X-linked Dominant. A woman
without hypophosphatemia and a man with hypophosphatemia have a daughter. The daughter mates with a
male without hypophosphatemia. What is the expected ‘phenotypic ratio’ of their offspring?
a. 2 unaffected females : 1 unaffected male : 1 male with hypophosphatemia
b. 1unaffected female : 1 female with hypophosphatemia : 1 unaffected male : 1 male with hypophosphatemia
c. 1 unaffected daughter : 1 son with hypophosphatemia
d. 1 daughter with hypophosphatemia : 1 unaffected son
e. 3 unaffected females : 1 male with hypophosphatemia
18. Suppose that having three nostrils is a Y-linked character. A woman with two nostrils mates with a
man with three nostrils. What is the expected ‘phenotypic ratio’ of their offspring?
a. 1daughter with two nostrils : 1 son with three nostrils
b. 1 daughter with two nostrils: 1 daughter with three nostrils: 1 son with two nostrils : 1 son with three nostrils
c. 2 daughters with two nostrils: 1 son with two nostrils: 1 son with three nostrils
d. 2 daughters with three nostrils: 1 son with two nostrils: 1 son with three nostrils
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Campbell/Reece Biology, Sixth Edition, © Pearson Education, Inc., publishing as Benjamin Cummings
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e. 2 sons with two nostrils: 1 daughter with two nostrils: 1 daughter with three nostrils
19. Humans diploid cells contain ____ sex chromosomes and ______ autosomes.
a. 2, 44
b. 1, 23
c. 46,23
d. 2, 46
e. 23,46
20. Linked genes are inherited together because they are _______ .
a. On sister chromatids
b. On homologous chromosomes
c. On the same chromosome
d. On different chromosomes
e. On the mitochondrial DNA
21. Which of the following statements is NOT Correct?
a. The Y- chromosomes encodes very few genes
b. 1 X of a female’s pair is inactivated during development
c. Sex linked disorders mostly all arise from the X-chromosome
d. X- linked disorders occur much more frequently in females
e. OY conditions can never produce viable offspring
f. None of the above
22. A particular diploid plant species has 48 chromosomes, or two sets. A mutation occurs and gametes
with 48 chromosomes are produced. If self-fertilization occurs, the gametes will have _____ set(s) of
chromosomes. This is called ________?
a. 1, monosomy
b. 2, polyploidy
c. 2, aneuploidy
d. 4, polyploidy
e. 4, aneuploidy
23. Which of these terms applies to an organism with extra/missing single chromosomes that can
result from chromosome non-disjunction during meiosis/mitosis?
a. Polyploidy
b. Haploid
c. Trisomy
d. Aneuploidy
e. Diploid
d. Haploid
e. Polyploid
24. An organism exhibiting the phenotypic norm is called a ________ ?
a. Mutant
b. Wild type
c. Hybrid
25. Who was the 1st person to link a ‘specific gene to a specific chromosome’?
a. Charles Darwin
d. Watson and Crick
b. Gregor Mendel
e. Rosalind Franklin
c. Thomas Morgan
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Campbell/Reece Biology, Sixth Edition, © Pearson Education, Inc., publishing as Benjamin Cummings
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26. The diploid number of human chromosomes is _____, the haploid number of human
chromosomes is _____?
a. 2, 44
b. 1, 23
c. 46,23
d. 2, 46 e. 23,46
27. Which of the following statements is NOT correct?
a. female egg cells can contain both x and y chromosomes
c. there is a 25:75 chance a couple will produce male/female offspring
e. every organism on earth contains X/Y sex chromosomes
b. females determine the sex of the child
d. the x & y chromosome are homologous
f. all of the above
28. Which of the following describes Down Syndrome?
a. chromosome deletion
d. genetic imprinting
b. polyploidy
e. chromosome translocation
c. aneuploidy
29. Which of the following statements is NOT Correct?
a. Besides the nucleus DNA is also found in the mitochondria of cells
b. Mitochondrial DNA has been linked to many diseases of aging
c. Mitochondrial DNA is derived solely from the males sperm
d. Mitochondrial DNA does not follow normal Mendelian genetics
e. None of the above
____________________________________________________________________________________
Campbell/Reece Biology, Sixth Edition, © Pearson Education, Inc., publishing as Benjamin Cummings
101

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