Unformatted text preview: 3. Give an example of a gene that specifies the same organ in both invertebrates and vertebrates. Name the organ. (2 pts). Either: 1. Pax6 or eyeless and eye development, or 2. Nkx2.5/tinman and heart development. 4. What are the three primary germ layers in the embryo? For one of the germ layers, give an example of an adult tissue it gives rise to. (2 pts). Ectoderm, mesoderm and endoderm, and either skin/epidermis, or muscle bone, or gut tissue 7. What type of nucleotide is used to terminate DNA elongation during the chain termination method of DNA sequencing? (1 pt). Dideoxynucleotide, or nucleotides missing the 3' hydroxyl group 10. Name two reasons why that could explain why the Dogon women of Mali have lower rates of breast cancer than American women? (2 pts). 1. Lactational menorrhea 2. more frequent pregnancies or fewer menstrual cycles...
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- Spring '09
- DNA, Germ layer, Embryo, anterior posterior patterning