set of Watch BBC video clip and gametes during meiosis and chromosomes. access information on mitosis fertilisation. and meiosis (see resources). All gametes are Describe how an embryo is genetically different Produce a poster to compare formed. from each other. mitosis and meiosis. Compare mitosis and Gametes join at meiosis (links with 4.1.2.1 fertilisation to and 4.1.2.2). restore the normal number of chromosomes. The new cell divides by mitosis, and as the embryo develops differentiate. Sex determination 4.6.1.6 Explain using a Punnett 0.5 Look at male and female Reebops’ Video clip: ‘Making square and genetic diagram karyotypes and identify the practical. Human body cells how sex is determined in number of of contain 23 pairs of chromosomes. humans. chromosomes and each pair of sex chromosomes. 22 pairs control Explain the probability of Use Reebops’ game to characteristics only. having a child that is a boy or ‘Making demonstrate variation (see The 23rd pair a girl. resources). carries the genes that determine sex. Watch BBC video clip about In females the sex Sex chromosomes (see chromosomes are resources). the same (XX); in Use a Punnett square and a males the genetic cross diagram to illustrate the inheritance of sex;
set of chromosomes. All gametes are genetically different from each other. Gametes join at fertilisation to restore the normal number of chromosomes. The new cell divides by mitosis, and as the embryo develops differentiate. gametes during meiosis and fertilisation. Describe how an embryo is formed. Compare mitosis and meiosis (links with 4.1.2.1 and 4.1.2.2). Watch BBC video clip and access information on mitosis and meiosis (see resources). Produce a poster to compare mitosis and meiosis. 4.6.1.6 Sex determination Human body cells contain 23 pairs of chromosomes. 22 pairs control characteristics only. The 23rd pair carries the genes that determine sex. In females the sex chromosomes are the same (XX); in males the Explain using a Punnett square and genetic diagram how sex is determined in humans. Explain the probability of having a child that is a boy or a girl. 0.5 Look at male and female karyotypes and identify the number of of chromosomes and each pair of sex chromosomes. Use ‘Making Reebops’ game to demonstrate variation (see resources). Watch BBC video clip about Sex chromosomes (see resources). Use a Punnett square and a genetic cross diagram to illustrate the inheritance of sex; ‘Making Reebops’ practical. Video clip:
AQA-8464-SOW-IVE.DOCX