View the process of fertilization. Examine reasons for the need for thousands of sperm cells to be present in order for fertilization to occur. Discuss why only a few dozen eventually reach the mature egg in the fallopian tube. Show on a video how the sperm must dissolve away protective coats around the egg. Once one egg has penetrated the covering, sperm receptors are dissolveed and do not allow a second sperm nucleus to enter.
In the lab, view microscopically mammalian sperm cells and starting ova cells