science 30 unit a ab-a2 - · pdf filescience 30: unit a chapter 2 assignment this assignment...

Science 30Unit A: MAintAining HeAltH

ASSignMent booklet A2

Science 30 © 2007 A

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Science 30Unit A: Maintaining HealthAssignment Booklet A2Chapter 2 Assignment

For Teacher’s Use only

summary Teacher’s comments

Total Possible Marks

YourMark

Chapter 2Assignment 76

Exploring the electronic information superhighway can be educational and entertaining. However, be aware that these computer networks are not censored. Students may unintentionally or purposely find articles on the Internet that may be offensive or inappropriate. As well, the sources of information are not always cited and the content may not be accurate. Therefore, students may wish to confirm facts with a second source.

This document is intended for

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Copyright © 2007, Alberta Education. This resource is owned by the Crown in Right of Alberta, as represented by the Minister of Education, Alberta Education, 10155 – 102 Street, Edmonton, Alberta, Canada T5J 4L5. All rights reserved.

This resource was developed by or for Alberta Education. It may be reproduced in any form, including photocopying, without written permission from Alberta Education provided that associated copyright notices are also reproduced.

THIS RESOURCE IS NOT SUBJECT TO THE TERMS OF A LICENCE FROM A COLLECTIVE OR LICENSING BODY, SUCH AS ACCESS COPYRIGHT.

� Assignment Booklet A2Science 30: Unit A


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assignmenT BookleT a2science 30: UniT a

chapTer 2 assignmenT

This Assignment Booklet is worth 76 marks out of the total 134 marks for the assignments in Unit A. The value of each assignment and each question is stated in the left margin.

Read all parts of your assignment carefully, and record your answers in the appropriate places. If you have difficulty with an assignment, go back to the textbook and review the appropriate lesson. Be sure to proofread your answers carefully before submitting your Assignment Booklet.

chapter 2 assignment: genetics

For questions 1 to 4, read each question carefully. Decide which of the choices BEST completes the statement or answers the question. Place your answer in the blank space given.

1. Use the following diagram to answer the question.

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Chromosome 1W X Y Z

In producing a karyotype, images of chromosomes are matched as pairs. In the diagram, which chromosome is the best match for Chromosome 1?

A. Chromosome W B. Chromosome X C. Chromosome Y D. Chromosome Z

2. The function of genes is to encode for the production of

A. carbohydrates B. proteins C. energy D. fats

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2 Assignment Booklet A2Science 30: Unit A


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3. In Gregor Mendel’s systematic studies of inheritance, he crossed round peas with wrinkled peas. The offspring were all round peas. Then these round peas were crossed with each other. What was the result?

A. all round peas B. 50% round peas and 50% wrinkled peas C. 75% round peas and 25% wrinkled peas D. 25% round peas and 75% wrinkled peas

4. In a dog’s body, each cell has 78 chromosomes. How many chromosomes are there in a dog’s sperm cells?

A. 18 B. 36 C. 78 D. 156

5. Match each description with the appropriate term listed. Place your answer in the blank space given.

i. insulin ii. actin or mayosin iii. antibody iv. amylase

a. a hormone

b. a contractile

c. an enzyme

d. a defensive protein

6. Decide whether each statement is true (T) or false (F). Place your answer in the blank space given.

a. Mitosis produces diploid cells.

b. A haploid cell is a fused cell that results from fertilization.

c. Meiosis produces haploid cells.

d. A fertilized egg develops further through meiosis.

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For questions 8 to10, read each question carefully. Decide which of the choices BEST answers the question. Place your answer in the blank space given.

8. Which of the following is an acquired trait rather than an inherited trait?

A. eye colour B. blood type C. colour blindness D. fluency in Spanish

9. Consider the O, A, B, and AB blood types for humans. How many alleles are there for the gene controlling these blood types?

A. 1 B. 2 C. 3 D. 4

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7. Describe the origin of modern corn. In your description, specify who was responsible for the development of a type of corn resembling that grown today. Describe what process was used and the span of time involved. Also, name the plant from which this corn was developed.

Return to page 15 of the Distributed Learning Student Guide, and begin Lesson 2.2.



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3

10. Use the following information to answer the question.

A market gardener crossed a tomato plant that had yellow fruit with one that had red fruit. This crossing resulted in 302 seeds. When these seeds matured into plants, 147 had yellow fruit and 155 had red fruit.

Which of the following Punnett squares represents the cross?

A. B.

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cC

C

c

CC

cC

cC cC

cc

C

c

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cc

C. D.

cC cC

cC

c

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CC

cC

CC cC

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c

cC

cC

11. Two pea plants in the parent generation each contain the dominant allele G that codes for green pea pods and the recessive allele g that codes for yellow pods. Use a Punnett square to predict the probability that a plant from the first generation will have yellow pea pods.



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12. The right-handed allele, R, is dominant over the left-handed allele, r. The Punnett square representing a cross between a homozygous left-handed male, rr, and a homozygous right-handed female, RR, is as follows.

rR rR

rR

r

r

RR

rR

a. Describe the left/right-handed genotype of the offspring.

b. Describe the left/right-handed phenotype of the offspring.

13. Suppose a certain individual CANNOT roll his or her tongue. Explain why you can conclude that this individual has two recessive alleles for this trait.

14. In cats, the gene that causes ginger fur is carried on the X chromosome. The allele for ginger colour, G, is dominant to the one for black colour, g.

a. Draw a sex-linked Punnett square for a ginger male cat crossed with a black female cat.

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b. Determine the probability of the male offspring having black fur.

c. Determine the probability of the female offspring having black fur.

d. Determine the probability of the female offspring being carriers of the recessive gene for black fur.

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For questions 15 to 21, read each question carefully. Decide which of the choices BEST answers the question. Place your answer in the blank space given.

15. In comparing the DNA molecule to a twisted ladder, which of the following would be on the steps or rungs of the ladder?

A. deoxyribose (sugar) B. phosphate groups C. nitrogen bases D. sucrose (sugar)

16. In comparing the DNA molecule to a twisted ladder, what would be on the sides of the ladder?

A. adenine B. cytosine C. guanine D. a phosphate group

17. In a certain DNA molecule, the sequence of base pairs on one side of the molecule is ACTCATTAG. What is the sequence of base pairs on the other side?

A. TAGCATACT B. TCATACTCA C. ATCGTATGA D. TGAGTAATC

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18. Which scientist discovered that the DNA molecule has a helix shape?

A. Maurice Wilkins B. Rosalind Franklin C. Erwin Chargaff D. Francis Crick

19. During the replication of a DNA molecule, the bonds between the nitrogen bases break, and the strands unzip. One unzipped segment with its exposed bases labelled looked like the following diagram.

TC

A

AT

G

T A

How many free-floating nucleotides with the nitrogen base thymine (T) will attach to the exposed bases of this segment?

A. 3 B. 4 C. 6 D. 8

20. The base sequence CAGCTTGGGAGGTTT was found on a gene segment. For which amino acid sequence does this base sequence encode?

A. glutamine-leucine-glycine-glycine-phenylanine B. histidine-proline-threonine-glycine-phenylanine C. leucine-glutamine-glycine-phenylanine-arginine D. glutamine-leucine-glycine-arginine-phenylanine

21. How many combinations of DNA nitrogen bases are possible in a DNA triplet code?

A. 20 B. 32 C. 64 D. 128

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22. Decide whether each statement is true (T) or false (F). Place your answer in the blank space given.

a. A-T is a possible base pair in a DNA molecule.

b. A-C is a possible base pair in a DNA molecule.

c. C-A is a possible base pair in a DNA molecule.

d. A-G is a possible base pair in a DNA molecule.

e. G-A is a possible base pair in a DNA molecule.

f. G-C is a possible base pair in a DNA molecule.

23. List the three possible DNA sequences of base codes for the production of the amino acid chain serine-methionine-glutamine.

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24. A base sequence started out as TTTTTAATACCC. Then a frame shift mutation changed the base sequence. Which of the following could have been the result of this frameshift mutation?

A. TTTTTAATACCC... B. TTTATAATACCC... C. TTTTTAATACCA... D. TTTTAATACCC...



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� 25. A man with hemophilia has a child with a woman who neither has the disease nor is a carrier of hemophilia. What is the probability that their child will have hemophilia?

A. 0% B. 25% C. 50% D. 75%

26. Use Queen Victoria’s pedigree chart for hemophilia to answer the question.�

Who was the first of Queen Victoria’s children to have a phenotype that conclusively indicated that Victoria was a carrier of the hemophilia allele?

A. Alice B. Leopold C. Beatrice D. Grand Duke of Hesse

27. Match each description with the appropriate term listed. Place your answer in the blank space given.

i. cystic fibrosis ii. Huntington disease iii. sickle-cell anemia iv. hemophilia

a. a disease in which brain cells die in specific regions of the brain

b. a disease in which the body produces mucous that is too thick

c. a disease in which red blood cells are abnormally shaped

d. a disease in which blood-clotting proteins are faulty

Queen Victoria’s Pedigree for Hemophilia female without hemophilia

male without hemophilia

female carrier

male with hemophilia

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? ? ? ?

Albert

Grand Dukeof Hesse

Beatrice

Victoria

Alice

Irene AliceTsar ofRussia

Prince ofPrussia

EnaKing ofSpain

Alexandra

Leopold

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�0 Assignment Booklet A2Science 30: Unit A


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28. At first, the beginning of a base sequence looked like TATCATCGTTGG. Then, due to a mutation, its beginning changed to TATCATCGCTGG.

a. Identify the type of mutation involved. Explain your answer.

b. Predict the effect this mutation will have on the sequence of amino acids produced. Explain your prediction.

29. A male who is homozygous for the dominant Huntington allele HH and a female who is heterozygous for the Huntington allele Hh are having a child.

a. Make a Punnett square to represent this situation.

b. Explain the probability that their child—when he or she becomes an adult—will have Huntington disease.

30. When an antibiotic is applied to treat an infection, some bacteria often survive the application. Explain why some survive.

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�� Assignment Booklet A2Science 30: Unit A


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31. List two ways in which bacteria incorporate new DNA into their chromosomes.2

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32. Which genetic technology will do the most to ensure that a fallen soldier’s body can be identified?

A. transgenics B. gene therapy C. genetic engineering D. DNA fingerprinting

33. To treat cystic fibrosis (CF) through gene therapy, a healthy gene that codes for the proper amino acid sequence is placed into the cells of the patient’s lung tissue. Which statement applies to this technology?

A. Airborne bacteria with the healthy gene are inhaled. B. CF patients are infected with a virus containing the healthy gene. C. Healthy genes are inhaled as free DNA fragments in an air sample. D. Healthy genes are injected into lung cells through microsurgery.

34. In placing a human gene for insulin production into bacteria, the human gene is placed into which part of the bacteria?

A. plasmid B. nucleus C. chromosome D. mitochondria

35. Insurance companies provide benefits—such as the cost of prescription drugs—to those who take out insurance policies and then become ill. Suppose genetic tests that indicate people’s health risks become widely available. How do you think this will affect the insurance industry? Explain your thinking on this issue.

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36. DNA in very small samples of body fluids can be used in forensic investigations. But there may be risks in relying too much on DNA evidence to establish a person’s guilt. Describe a risk that you can think of.

37. Gene therapy may help people who have genetic disorders. Gene therapy targets body cells only and not the gametes (egg and sperm cells). What risk is avoided by targeting only body cells? Explain your thinking.

38. A promoter of a new genetically modified variety of rice stated the following in a letter to the editor:

A genetically modified (GM) rice known as “golden rice” has been produced. The rice is somewhat yellow in colour due to the same pigment that gives carrots and sweet potatoes their colour. This pigment is beta-carotene, which can be converted by the body to vitamin A. Vitamin A deficiency is the cause of 500 000 cases of irreversible blindness each year. By growing the new GM rice and making it widely available to people in poor countries, these cases of blindness could be avoided.

Think of several different groups or individuals with an interest in the issue raised in this letter. Make a table to identify alternatives/perspectives. The table should list at least three stakeholders and their perspectives or viewpoints.

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Submit your completed Assignment Booklet A2 to your teacher for assessment.Then return to page 20 of the Distributed Learning Student Guide,

and begin the Chapter 2 Summary.

� 39. Name four GM crops or organisms. For each example, describe a characteristic that has been improved by its genetic modification.

science 30 unit a ab-a2 - · pdf filescience 30: unit a chapter 2 assignment this assignment...

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