Starter quiz
- Reproduction that involves two organisms is called ...
- asexual reproduction
- mitosis
- sexual reproduction ✓
-
- What is the name of the process where the sperm and the egg fuse together?
- fusion
- fertilisation ✓
- mitosis
- meiosis
-
- What is the name of the cell that is produced by the fusing of the sperm and the egg during fertilisation?
- gamete
- embryo
- zygote ✓
-
- DNA is highly coiled to form the ...
- nucleus.
- chromosomes. ✓
- ribosomes.
-
- Put these stages of the cell cycle and cell division in order.
- 1⇔DNA is copied
- 2⇔chromosomes line up along the middle of the cell
- 3⇔chromosomes are pulled to either end of the cell
- 4⇔cell membrane and cytoplasm divide
- 5⇔two new cells are produced
- Gametes are the name given to sex cells; what are the sex cells in humans?
- pollen
- egg ✓
- testes
- sperm ✓
-
Exit quiz
- What word is used to describe the sex cells?
- 'gametes' ✓
- Match each process to the correct description.
- fertilisation⇔where the sperm and egg fuse to form the zygote ✓
- meiosis⇔cell division that forms the gametes ✓
- sexual reproduction⇔involves two parents producing genetically different offspring ✓
- asexual reproduction⇔reproduction involving only one organism ✓
- Put the stages of meiosis into the correct order.
- 1⇔The chromosomes line up and DNA is mixed.
- 2⇔The first cell division occurs.
- 3⇔Two diploid cells are produced.
- 4⇔Cell division two occurs.
- 5⇔Four haploid gametes are produced.
- What word is used to describe cells with half the number of chromosomes?
- 'haploid' ✓
- Which of the following are true for mitosis?
- two cell divisions take place
- two diploid cells are produced ✓
- cells produced are genetically identical ✓
- the gametes are formed by this process
-
- Which statements are true for meiosis?
- DNA mixes causing variation ✓
- four diploid cells are produced
- only one cell division occurs
- the process is used to form the gametes ✓
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Worksheet
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Lesson Details
Key learning points
- Reproduction is part of the life cycle of all organisms; sexual reproduction requires specialised cells called gametes.
- Gametes are made from body cells by a type of cell division called meiosis.
- During interphase the chromosomes are copied; meiosis follows this and includes two rounds of cell division.
- The gametes made by meiosis have half the usual number of chromosomes (one from each pair in the original body cell).
- Mitosis produces 2 genetically identical diploid cells, whereas meiosis produces 4 genetically different haploid cells.
Common misconception
Knowing the differences between mitosis and meiosis. In particular when they are used, the number of cell divisions and if variation is present.
The final learning cycle of the lesson serves to compare the features of mitosis and meiosis, this includes CFU questions and a practice task.
Keywords
Sexual reproduction - A type of reproduction that combines the genetic material of two organisms to produce genetically different offspring.
Gametes - An organism's sex cells that contain half the number of chromosomes.
Meiosis - A type of cell division that forms the gametes.
Chromosomes - Highly coiled strands of DNA found inside the nucleus of eukaryotic cells.
Haploid - A cell with half the number of chromosomes.
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