Cl05ppt - MCDB 4650 Class 5 Fertilization and Cleavage...

Info icon This preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon
MCDB 4650 Class 5 F ili i d Cl Fertilization and Cleavage Describe, in a general way, the process of fertilization and the different features of sperm and oocyte. Explain how the orientation of cleavage planes is determined. Relate the orientation of cleavage planes to establishment of cell fate. E l i th i t f d di t f th id Explain the importance of and predict consequence of the mid- blastula transition
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Eggs are at different stages of maturation at fertilization depending on the organism 7.5
Image of page 2
Stages in mammalian egg maturation 1st arrest in G2 phase of meiosis I 2nd arrest at metaphase of meiosis II Ovulation
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Typical structure of sperm G 7.2
Image of page 4
Typical structure of an egg
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Which of the following statements best describes the process of fertilization? ) th t t i l f th a) the egg reacts to signals from the sperm. b) the sperm reacts to signals from the egg. c) each of the two gametes reacts to signal from the other. What are some ways they can unite?
Image of page 6
Protein components of the egg zona pelucida Mammalian fertilization
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Mammalian fertilization What happens to the mitochondria of the sperm? a They don’t enter the egg a. They dont enter the egg b. They are degraded completely c. They function alongside the mitochondria from the egg in the fertilized embryo What component of sperm is important for continued development (besides the nuclear contents)?
Image of page 8
Fusion of the two pronuclei (sperm and egg) Blue: DNA green: microtubules S t i l Sperm centriole organizes the first aster and spindle for the first division In mammalian eggs, the contents of each nucleus actually replicate before joining in the center to begin first mitosis
Image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
What events does fertilization trigger? Cl th t f d l t Cleavage: the onset of development
Image of page 10