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This 1 page Class Notes was uploaded by Kevin Braga on Saturday September 3, 2016. The Class Notes belongs to at University of Maryland - College Park taught by in Fall 2016. Since its upload, it has received 5 views.
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Date Created: 09/03/16
STUDY QUESTIONS FOR CHAPTER 47 : ANIMAL DEVELOPMENT 1. Name the two types of reproductive cells. Egg, spermWhat type of cell division results in the formation of the gametes? Are they haploid or diploid? 2. What do you understand by fertilization? – egg + sperm – joining haploid sets of chromosomes from 2 individuals into single cell 3. What are the different events that are involved in the process? Acrosome reaction, cortical reaction,activation of egg 4. What is the acrosomal reaction? How is polyspermy prevented? acrosome (vesicle at tip of sperm) releases hydrolytic enzymes digests jelly coat surrounding egg; acrosomal process elongates proteins at tip of acrosomal process bind to receptor on egg plasma membrane (often helps ensure only sperm of same species fertilizes egg) Fusion of sperm and egg membrane Fast block to polyspermy (membrane depolarization) 5. What is the zygote? Is it haploid or diploid? a diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum. 6. Name and describe the stages and events of early development from fertilization to organogenesis. (know such terms as: cleavage, morula, blastulation, blastula, gastrulation, gastrula, germ layers), Archenteron, blastopore, blastomeres,. 7. Should know the order of the different stages. 8. The stage of development where there is no increase in overall mass but the number of cells increases 9. List two organs that develop from each of the 3 germ layers: ectoderm, mesoderm, and endoderm. 10. What are stem cells? An undifferentiated cell that is capable of dividing and giving rise to one or more distinct types of specialized cells 11. Why are embryonic stem cells more versatile than adult stem cells? Embryonic stem cells can become all cell types of the body because they are pluripotent. Adult stem cells are thought to be limited to differentiating into different cell types of their tissue of origin 12. What are the two events that are responsible for cell differentiation? : Cell determinants and cell to cell induction.
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