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Sexual Reproduction & Genetic Variation – 20 Question Multiple Choice Worksheet
1. Sexual reproduction increases species ________ by combining genetic material from two parents.
• A. uniformity
• B. diversity
• C. stability
• D. mutation

2. Sexual reproduction differs from asexual reproduction because it involves ______ parents.
• A. zero
• B. one
• C. two
• D. four

3. Gametes are specialized sex cells formed through ________.
• A. mitosis
• B. meiosis
• C. fertilization
• D. pollination

4. Understanding genetics and reproduction helps explain ______ patterns.
• A. weather
• B. migration
• C. inheritance
• D. feeding

5. Meiosis forms ______ cells with half the genetic material.
• A. diploid
• B. somatic
• C. haploid
• D. identical

6. Somatic cells undergo mitosis while gametes undergo ________.
• A. fertilization
• B. pollination
• C. fission
• D. meiosis

7. Fertilization requires gametes to ________.
• A. divide
• B. fuse
• C. mutate
• D. duplicate

8. Sexual reproduction mixes genetic material, increasing ________.
• A. variation
• B. uniformity
• C. extinction
• D. cloning

9. Asexual reproduction produces offspring that are ________ to the parent.
• A. similar
• B. identical
• C. different
• D. unpredictable

10. Meiosis reduces chromosome number by ________.
• A. double
• B. increasing
• C. half
• D. none

11. Fusion of male and female gametes restores the full chromosome number in the ________.
• A. embryo
• B. somatic cell
• C. zygote
• D. pollen

12. Genetic recombination during meiosis increases ________.
• A. extinction
• B. diversity
• C. cloning
• D. uniformity

13. Gametes carry ______ the usual number of chromosomes.
• A. double
• B. the same
• C. half
• D. none

14. Somatic cells contain ______ sets of chromosomes.
• A. one
• B. two
• C. three
• D. four

15. Fertilization forms a ______ that begins development.
• A. pollen grain
• B. stem
• C. zygote
• D. gamete

16. Pollination transfers pollen to the ______.
• A. leaf
• B. stigma
• C. root
• D. sepal

17. In plants, fertilization occurs when pollen reaches the ________.
• A. ovule
• B. stamen
• C. petal
• D. stem

18. Crossing over during meiosis increases ________.
• A. competition
• B. diversity
• C. disease
• D. mutation

19. Random fertilization ensures ________ genetic outcomes.
• A. identical
• B. uniform
• C. unique
• D. harmful

20. Sexual reproduction improves species ________ in changing environments.
• A. extinction
• B. adaptability
• C. cloning rates
• D. uniformity

All Answers 1

Answered by GPT-5 mini AI
Answer key — correct choices:

1. B
2. C
3. B
4. C
5. C
6. D
7. B
8. A
9. B
10. C
11. C
12. B
13. C
14. B
15. C
16. B
17. A
18. B
19. C
20. B

If you want, I can add brief explanations for any of the answers.