Chapter 11: Introduction to Genetics Pre-Test



Chapter 11: Introduction to Genetics Pre-Test

**Your chapter 11 test is tomorrow, Friday, February 6**

Test will cover sections 11-1, 11-2, and 11-3

Definitions (you should know these)

1. genetics

2. true-breeding

3. trait

4. hybrid

5. gene

6. allele

7. gamete

8. P generation

9. F1 generation

10. F2 generation

11. homozygous

12. heterozygous

13. phenotype

14. genotype

15. incomplete dominance

16. co-dominance

17. multiple alleles

18. polygenic traits

Questions (you should be able to answer these)

1. Who was Gregor Mendel and what did he do?

2. List Mendel’s principles (see 11-3).

3. How are Punnett squares used? Do Punnett squares represent the actual outcomes or possible outcomes?

Punnett Square Practice (you should be able to do these)

For questions 1-10 use the information below.

Fruity flowers produce two different color flowers, red which is dominant (R) and white which is recessive (r).

1. ______What is the genotype of a fruity flower that produces white flowers?

a. RR

b. Rr

c. rR

d. rr

2. ______What is the phenotype of a fruity flower that has the genotype Rr?

a. red

b. white

c. pink

d. red and white

3. _______What phenotype(s) of flowers will be produced by crossing a true breed red fruity flower with a white fruity flower? Create a Punnett square to answer this question.

a. all red

b. all white

c. half red half white

d. all pink

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4. _______What are the genotypes of the offspring produced if you cross two heterozygous fruity flowers? Create a Punnett square to answer this question

a. 1RR:2Rr:1rr

b. 2 RR:2rr

c. 4Rr

d. 3red:1white

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5. _______ What are the phenotypes of the offspring produced if you cross two heterozygous fruity flowers? Create a Punnett square to answer this question

a. 4 red flowers

b. 2 red and 2 white flowers

c. 3 red and 1 white flower

d. 1RR:2Rr:1rr

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6. _______What is the probability of producing a white fruity flower if you cross two heterozygous fruity flowers? Create a Punnett square to answer this question

a. 100%

b. 75%

c. 50%

d. 25%

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7. ________ If you planted 100 seeds produced by the cross in question number 34, how many of the seeds would you expect to produce red flowers?

a. 100

b. 75

c. 50

d. 25

8. _______What is the phenotypic ratio of the offspring produced by crossing a heterozygous red fruity flower with a white fruity flower. Create a Punnett square to answer this question.

a. 2Rr:2rr

b. 1RR:2Rr:1rr

c. 2 red and 2 white flowers

d. 3 red and 1 white flower

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9. _______ What is the genotypic ratio of the offspring produced by crossing a heterozygous red fruity flower with a white fruity flower. Create a Punnett square to answer this question

a. 2Rr:2rr

b. 1RR:2Rr:1rr

c. 2 red and 2 white flowers

d. 3 red and 1 white flower

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10. _______What is the probability of producing a red fruity flower if you crossed a heterozygous red fruity flower with a white flower. Create a Punnett square to answer this question

a. 100%

b. 75%

c. 50%

d. 25%

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Use the information below to answer questions 11-17

Fruity flowers also produce berries in three colors blue (BB), yellow (YY), and green which is the result of incomplete dominance.

11. ______What is the genotype of a fruity flower that produces green berries?

a. BB

b. YY

c. BY

12. ______What are the genotypes of the offspring produced by crossing a fruity flower that produces blue berries with a fruity flower that produces yellow berries? Remember green is the result of incomplete dominance. Create a Punnett square to answer this question.

a. 2BB:2YY

b. 4BY

c. 4BB

d. 4YY

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13. _______What are the phenotypes of the offspring produced by crossing a fruity flower that produces blue berries with a fruity flower that produces yellow berries? Remember green is the result of incomplete dominance. Create a Punnett square to answer this question.

a. all blue berries

b. all yellow berries

c. 2 blue and 2 yellow berries

d. All green berries

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14. ______What is the genotypic ratio of the offspring produced if you cross two green berry producing fruity flowers? Remember green is the result of incomplete dominance. Create a Punnett square to answer this question.

a. 1BB:2BY:1YY

b. 4 YY

c. 4 BY

d. 2BY:2BB

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15. ______What is the probability of producing a fruity flower with blue berries if you cross two green berry producing fruity flowers? Remember green is the result of incomplete dominance. Create a Punnett square to answer this question.

a. 100%

b. 75%

c. 50%

d. 25%

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16. _______ If you planted 100 seeds produced by the cross in question number 43, how many of the seeds would you expect to produce green berry producing fruit flowers?

a. 25

b. 50

c. 75

d. 100

17. ______What are the phenotype(s) of the offspring produced by a cross of a blue berry procuring fruity flower with a yellow berry producing fruity flower?

a. all green berries

b. all red berries

c. all blue berries

d. half red berries half blue berries

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