spider plant Gametes are pollination of flowers (see producing produced by resources). runners meiosis. Observe exhibition showing 4.6.1.1 bulb Asexual asexual reproduction in amoeba reproduction different organisms. yeast. involves only one Give examples of sexual and parent and no asexual reproduction in fusion of gametes. different organisms. There is no mixing View the BBC guide to sexual of genetic and asexual reproduction (see information. This resources). leads to genetically identical offspring (clones). Only mitosis is involved. Consider fusion of sex cells at 4.6.1.2 Meiosis Explain the term gametes 1 Use bio-viewers, video Mitosis and meiosis: fertilisation and explain why and describe their genetic clips or images to show Cells in Knowledge and gametes have only one set of material. chromosomes and reproductive organs understanding of the chromosomes use models or meiosis. – divide by meiosis to stages in meiosis are Explain why sexual diagrams. form gametes. not required. reproduction results in When a cell divides Make models to show what variety. to form gametes: happens during fertilisation Draw diagrams to explain copies of the (‘Play-Doh’ is this could – how gametes are formed in genetic information be extended to a stop frame are made and the meiosis. animation if ICT is available. cell divides twice to Explain the number of form four gametes, chromosomes in the each with a single
4.6.1.1 Gametes are produced by meiosis. Asexual reproduction involves only one parent and no fusion of gametes. There is no mixing of genetic information. This leads to genetically identical offspring (clones). Only mitosis is involved. pollination of flowers (see resources). Observe exhibition showing asexual reproduction in different organisms. Give examples of sexual and asexual reproduction in different organisms. View the BBC guide to sexual and asexual reproduction (see resources). spider plant producing runners bulb amoeba yeast. 4.6.1.2 Meiosis Cells in reproductive organs divide by meiosis to form gametes. When a cell divides to form gametes: copies of the genetic information are made and the cell divides twice to form four gametes, each with a single Explain the term gametes and describe their genetic material. Explain why sexual reproduction results in variety. Draw diagrams to explain how gametes are formed in meiosis. Explain the number of chromosomes in the 1 Consider fusion of sex cells at fertilisation and explain why gametes have only one set of chromosomes – use models or diagrams. Make models to show what happens during fertilisation (‘Play-Doh’ is – this could be extended to a stop frame animation if ICT is available. Use bio-viewers, video clips or images to show chromosomes and meiosis. Mitosis and meiosis: Knowledge and understanding of the stages in meiosis are not required.