Compared to a differentiated cell in the body, embryonic cells at the blastocyst stage have: O Less tightly packed chromatin and fewer repressed genes. More tightly packed chromatin and more repressed genes. O The same epigenetic status. An unknown epigenetic status (not yet discovered).

The protein p53 is a tumor suppressor - it is important in preventing cancer in humans. What phenotype would you expect in p53 knockout mice? O p53 knockout mice would not be helpful in the study of a human disease O p53 knockout mice would not be able to go through meiosis O p53 knockout mice would be more susceptible to cancers O p53 knockout mice would not get cancer O p53 knockout mice would not be able to go through mitosis

Choose only one option:

True or False: Follicle cells on the dorsal side of the Drosophila embryo produce the Backless protein.