This is not a complete exam, which normally consists of about half short answer and about discussion questions. But it will give you a sense of the kinds of questions that are asked on the exams. 

Developmental Biology,                                                 Exam I,  Name: __________________

1. Which of the following genes exhibit the highest degree of transcriptional activity during oogenesis?

a. rRNA genes

b. mRNA genes

c. tRNA genes

d. none of the above, there is little transcriptional activity during oogenesis

2. Which of the following molecules are considered SAM's?

a. fibronectin

b. laminin

c. glycosylaminoglycans

d. all of the above

e. none of the above,

4. Which of the following cells is considered haploid?

a. primary spermatocyte

b. secondary spermatocyte

c. type B spermatogonia

d. all of the above

e. none of the above, these are all considered diploid

5. Which of the following statements describes the findings of Townes and Holfrettors work with disassociated amphibian germ layers?

a. isolated ectoderm and mesoderm reaggregate and segregate

b. isolated ectoderm, mesoderm and endoderm cells reaggrate and reflect their normal embryonic positions

c. selective cell affinity changes during development

d. mixed cells interact to form the lowest free energy state

e. all of the above

7. Cell migration during development seems to be mediated by:

a. Actin microfilaments

b. laminar glycoproteins

c. contact guidance

d. all of the above

e. none of the above

8. Which of the following is characteristic of Eukaryote DNA?

a. is found in association with histones

b. produces protein sequence that is colinear with DNA's base pairs

c. transcription is followed immediately by translation

d. all of the above

e. none of the above, these are characteristic of Prokaryote DNA

10. Which of the following models was used to demonstrate that differential cell affinity toward the ECM changes during development?

a. centrifuging heart, limb, and liver cells and looking for deformation

b. the cell movements during the onset to gastrulation in sea urchins

c. the reassociation of sponge cells with the addition of Ca⁺⁺/Mg⁺⁺

d. all of the above

e. none of the above

11. Which of the following processes was demonstrated by studies utilizing Dictyostellium?

a. chemotaxis

b. differentiation in response to a chemical stimulus

c. the role of CAM's in development

d. all of the above

e. none of the above

13. What was the significance of the Operon Model for embryologists?

a. genes were shown to be reactive to Thier environment

b. introns were necessary for gene regulation

c. that transcription and translation were separate spatially and temporally

d. all of the above

e. none of the above

14. In every case studied, differentiated cells of a multicellular organism have identical genetic constitutions.

a. true

b. false

15. Discussion, compare and contrast the patterns of cleavage in amphibians and aves.