Animal development study guide questions

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Animal development study guide questions

Post  serasarah18 on Sat Mar 15, 2008 11:50 pm

For question 3 on the study guide, it asks about the similarities and differences between early development of a sand dollar embryo and a human embryo. All I know is that they basically go through similar processes of fertilization, cleavage, and gastrulation, but begin to differ in structure and function when the cells begin to differentiate. Do we have to know anything more specific than that?

For question 4, again I have a very broad answer that the purpose of gastrulation is that there is a dramatic rearrangement of cells of the blastula to form a three-layered embryo with primitive gut. Do we have to go into great detail like the book?


Last edited by serasarah18 on Sun Mar 16, 2008 10:37 pm; edited 1 time in total

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Re: Animal development study guide questions

Post  TA Sean on Sun Mar 16, 2008 6:59 pm

I wish I could help on this, I missed this lecture b/c I was out with the flu and so I'm not 100% sure what was spoken about. Maybe someone else will get a chance to chime in or you can try to email a TA directly

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Re: Animal development study guide questions

Post  jjna on Mon Mar 17, 2008 4:28 am

I asked a TA about this question from review session

and for #3,
he said that we only need to know that during the early stage of development,
we wouldn't really know or see the difference between the two
because it has just determined what kind of differences it will make. (fate is determined)
but later on as differentiation takes place in the development process,
the embryos will show specificity in their cells and will show differences.


I didn't ask about #4
but i think we only need to know that
the purpose of grusturation is to form a grustula (3-layered embryo) from a bastula.


......
i hope that helped...

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