Expert Lecture #6

This time Jonah’s mom came in to talk about genetics. she talked about chromosomes and marking about genetics. In the end, she also gave us some books we could read about the topic. I had a really fun time!

Your gender is determined by chromosomes, one from your dad, and one from you mom. A male’s chromosomes is made up of one X chromosome and one Y chromosome. On the other hand, females have 2 X chromosomes, and no Y chromosomes. Your mom will definitely give you an X chromosome, while you dad could give you either an X or Y chromosome. So nobody has 2 Y chromosomes. The chromosome is passed through by a sperm. So basically the sperm determines your gender. If you are a boy or man, the sperm from your dad had an Y chromosome, while if you are a girl or woman, the sperm had an X chromosome.

Marking a family in the genetical way sounds a bit complicated, since it can go on forever. Male people are marked by squares, while females are marked by circles. A couple is marked by the square on the left, the circle on the right. an unknown gender is marked as a diamond with a p in it. If adopted, the person adopted is marked as its gender inside a [ ], with a connected line to the person who adopted the other person.

We marked Harry Potters family in the genetical way. It was so fun. I had a great experience.