Get this resource at a discount in our Human Reproductive System Unit!
Students learn that the function of the reproductive system is to make cells that combine to make an offspring. Learn how an EGG made by the ovary combines with a SPERM from the testes to create a ZYGOTE in the process of FERTILIZATION.
In this activity, students will:
- READ information about eggs, sperm, and that their chromosomes (23 each) combine in fertilization to make a zygote (46 chromosomes).
- MAKE A ZYGOTE in pairs. Students are provided with an egg and a sperm. They cut out the chromosomes in each and match homologous chromosomes using a provided key.
- DETERMINE THE ZYGOTE’S GENDER by finding out if the zygote is XX or XY. (Both X and Y sperm are included so there will be both boy and girl zygotes in a class.)
- ANSWER FOLLOW-UP QUESTIONS on a worksheet.
Please Note: There is NO mention of intercourse or sexual interaction in this resource. The resource discusses fertilization as a sperm joining an egg, minus the intercourse part. I feel comfortable recommending this resource to middle school teachers who want to cover the purpose of the reproductive system without getting into tricky territory.