There are six boxes on this genetics worksheet. In one, learners draw and label the DNA molecule. In another, they compare pre-mRNA to mRNA. Other boxes require definitions, labeling, and explaining relationships. 

Young scholars begin by using clay to model fertilization and early development of sea urchins and chordates. They move on to mixing live sea urchin sperm and ova together to observe, diagram and record events occurring in fertilization...

This lesson will explain the processes involved in fertilization of a female egg. It is 5 of 5 in the series titled "Fertilization."