GCSE Biology – Variation within a population

Last updated: 30/04/2020
Eduqas GCSE Science – Biology higher Inheritance, variation and evolution GCSE Biology – Variation within a population

Learning Objectives

-I can recall the number of pairs of chromosomes in a human body cell
-I can recall that sex is determined by the X and Y chromosomes
-I can describe how phenotype can be influenced by genes and the environment
-I can recall that difference in a population in variation
-I can describe the factors that affect variation within a population

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  1. Current
  2. Review
  3. Answered

  1. How many pairs of chromosomes are there in a human body cell?

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  2. What are the two sex chromosomes?

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  3. What do females have as their sex chromosomes?

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  4. What do males have as their sex chromosomes?

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  5. Which sex chromosome is the larger one?

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  6. Which sex chromosome is the smaller one?

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  7. What can cause variation?

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  8. What is variation in terms of phenotype?

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  9. If the new phenotype is suited to the environment, what can happen?

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  10. What is genetic variation?

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  11. What is genetic variation due to?

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  12. Why might the mutation be preferable?

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  13. How often do mutations cause variation?

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  14. What can rarely happen when a mutation occurs?

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  15. Most mutations…

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  16. Give an example of variation caused by genes.

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  17. Give an example of variation caused by genes.

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  18. Give an example of variation caused by environment.

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  19. Give an example of variation caused by environment.

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  20. Give an example of variation caused by genes and the environment.

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  21. Why is blood group variation caused by genes?

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  22. Why are scars caused by environmental factors?

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  23. Why is hair colour variation due to genes and environment?

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  24. How much genetic variation is there within a population?

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  25. What are “genetic factors”?

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