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Use twins and clones to separate genes from environment

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.MS-LS1-5, NGSS.MS-LS3-2, NGSS.SEP 7 · England: KS3 Biology: Inheritance, chromosomes, DNA and genes, GCSE Combined Science: Inheritance, variation and evolution

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Score/ 16

  1. Question 1

    Cuttings from one geranium plant (clones with identical genes) were grown in sun and in shade. Mean height after 8 weeks: sun 53 cm, shade 38 cm. What can you conclude?

    • A. Height is controlled only by genes.
    • B. The difference in height was caused by the environment (light).
    • C. The results show light has no effect.
    • D. The plants in the shade had different genes.

  2. Question 2

    Genes and environment: which statement is NOT true?

    • A. A suntan is caused by the environment.
    • B. Differences between identical twins are caused by the environment.
    • C. Clones have identical genes.
    • D. Environmental variation is passed on to offspring.

  3. Question 3

    Two rabbits from the same litter are fed different diets and grow to different sizes. Why can we not be sure the difference is only due to diet?

    • A. Rabbits do not have genes
    • B. Diet never affects size
    • C. The rabbits are clones
    • D. Brothers and sisters do not have identical genes

  4. Question 4

    Cuttings from one geranium plant (clones with identical genes) were grown in sun and in shade. Mean height after 8 weeks: sun 49 cm, shade 35 cm. What can you conclude?

    • A. The plants in the shade had different genes.
    • B. Height is controlled only by genes.
    • C. The results show light has no effect.
    • D. The difference in height was caused by the environment (light).

  5. Question 5

    Genes and environment: which statement is NOT true?

    • A. Identical twins always have identical body mass.
    • B. A suntan is caused by the environment.
    • C. Differences between identical twins are caused by the environment.
    • D. Height depends on both genes and environment.

  6. Question 6

    Two rabbits from the same litter are fed different diets and grow to different sizes. Why can we not be sure the difference is only due to diet?

    • A. The rabbits are clones
    • B. Brothers and sisters do not have identical genes
    • C. Rabbits do not have genes
    • D. Diet never affects size

  7. Question 7

    Cuttings from one geranium plant (clones with identical genes) were grown in sun and in shade. Mean height after 8 weeks: sun 41 cm, shade 25 cm. What can you conclude?

    • A. The difference in height was caused by the environment (light).
    • B. Height is controlled only by genes.
    • C. The results show light has no effect.
    • D. The plants in the shade had different genes.

  8. Question 8

    Genes and environment: which statement is NOT true?

    • A. Height depends on both genes and environment.
    • B. Blood group is changed by diet.
    • C. A suntan is caused by the environment.
    • D. Differences between identical twins are caused by the environment.

  9. Question 9

    Why are identical twins so useful in studying variation?

    • A. They have the same genes, so differences must be environmental
    • B. They always live in the same house
    • C. They have no genes
    • D. They never vary at all

  10. Question 10

    Cuttings from one geranium plant (clones with identical genes) were grown in sun and in shade. Mean height after 8 weeks: sun 41 cm, shade 30 cm. What can you conclude?

    • A. The results show light has no effect.
    • B. The plants in the shade had different genes.
    • C. Height is controlled only by genes.
    • D. The difference in height was caused by the environment (light).

  11. Question 11

    Genes and environment: which statement is NOT true?

    • A. A suntan is caused by the environment.
    • B. Height depends on both genes and environment.
    • C. Differences between identical twins are caused by the environment.
    • D. Blood group is changed by diet.

  12. Question 12

    Two rabbits from the same litter are fed different diets and grow to different sizes. Why can we not be sure the difference is only due to diet?

    • A. Brothers and sisters do not have identical genes
    • B. Diet never affects size
    • C. Rabbits do not have genes
    • D. The rabbits are clones

  13. Question 13

    Cuttings from one geranium plant (clones with identical genes) were grown in sun and in shade. Mean height after 8 weeks: sun 41 cm, shade 29 cm. What can you conclude?

    • A. The results show light has no effect.
    • B. The difference in height was caused by the environment (light).
    • C. The plants in the shade had different genes.
    • D. Height is controlled only by genes.

  14. Question 14

    Genes and environment: which statement is NOT true?

    • A. A suntan is caused by the environment.
    • B. Height depends on both genes and environment.
    • C. Differences between identical twins are caused by the environment.
    • D. Blood group is changed by diet.

  15. Question 15

    Hydrangea flowers of the same variety are blue in acidic soil and pink in alkaline soil. This is an example of…

    • A. a mutation
    • B. natural selection
    • C. genetic variation
    • D. environmental variation

  16. Question 16

    Cuttings from one geranium plant (clones with identical genes) were grown in sun and in shade. Mean height after 8 weeks: sun 48 cm, shade 30 cm. What can you conclude?

    • A. The results show light has no effect.
    • B. The difference in height was caused by the environment (light).
    • C. Height is controlled only by genes.
    • D. The plants in the shade had different genes.

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Answer key: Use twins and clones to separate genes from environment

  1. 1. B. The difference in height was caused by the environment (light).

  2. 2. D. Environmental variation is passed on to offspring.

  3. 3. D. Brothers and sisters do not have identical genes

  4. 4. D. The difference in height was caused by the environment (light).

  5. 5. A. Identical twins always have identical body mass.

  6. 6. B. Brothers and sisters do not have identical genes

  7. 7. A. The difference in height was caused by the environment (light).

  8. 8. B. Blood group is changed by diet.

  9. 9. A. They have the same genes, so differences must be environmental

  10. 10. D. The difference in height was caused by the environment (light).

  11. 11. D. Blood group is changed by diet.

  12. 12. A. Brothers and sisters do not have identical genes

  13. 13. B. The difference in height was caused by the environment (light).

  14. 14. D. Blood group is changed by diet.

  15. 15. D. environmental variation

  16. 16. B. The difference in height was caused by the environment (light).