So- I hold a geology degree and now after many years teaching GCSE physics I’m asked to teach GCSE Biology. All is good so far, no problems at all that I’m aware of- but…

…with Punnet Squares, is there a convention to be followed/ taught re: the positioning of male and female gametes on the square/ chart?

FWIW, I’ve always put the male components on top.

FWIW, I’ve always put the male components on top.

Are you a missionary? 🙂

Makes no difference to the exam marking.

Keep it consistent, kids find them confusing enough. I’d suggest doing it in 2 colours of pens- and getting them to do the same in their books to help them see where the genes come from/ go in the square.

There are some ace simpsons genetics lessons floating about.

I use my family. Mum, dad and me with black hair and brown eyes but my sister with blond hair and blue eyes. What are the chances of me having blond haired, blue eyed babies if….

@tall-martin, likewise. So there is no convention re: position of male female gametes? I’m liking the colours idea, it only confirms what I’m already doing. Phew. And thanks.