Chapter 21: Development and Inheritence
Labeling


1.  

 
For each item below, use the pull-down menu to select the letter which labels the correct part of the image.
Oocyte at ovulation
Fertilization and oocyte activation
Pronucleus formation begins
Cytokinesis begins
Metaphase of first cleavage division
Spindle formation and cleavage preparation

2.  

 
For each item below, use the pull-down menu to select the letter which labels the correct part of the image.
First cleavage division
2-cell stage
4-cell stage
Morula
Blastocyst


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