About This Lesson
To enable students to understand and state how meiosis and fertilization can lead to variation.
At the end of the lesson, students should be able to:
1) Understand and state that meiotic event such as independent assortment of homologous chromosomes during metaphase I leads to genetic variation due to the various possible different combinations of chromosomes.
2) Understand and state that crossing over between homologous chromosomes during prophase I leads to portions of the chromatids being swapped as the chromatids break and recombine with a different chromatid.
3) Understand that new combinations of the varieties of a gene results in formation of gametes that are genetically different due to crossing over between homologous chromosomes during prophase I.
4) Understand and state that fertilization is random and produce variations in the offspring due to formation of genetically non-identical gametes due meiosis.
5) State and describe how meiosis and fertilization can lead to variation.
