This video is for Edexcel IGCSE Biology 9-1 but is relevant for many GCSE Biology courses. It covers these specific objectives from the syllabus
3.24 Understand how to interpret family pedigrees.
3.26 Understand how the sex of a person is controlled by one pair of chromosomes, XX in a female and XY in a male.
3.27 Describe the determination of the sex of offspring at fertilisation, using a genetic diagram.
You can download a teaching PowerPoint for this topic here: [ Ссылка ]
Or one for the whole course here: [ Ссылка ]
I also have a TES Shop here: [ Ссылка ]
