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datQvault question about embryo

Discussion in 'DAT Discussions' started by jbop, Aug 13, 2011.

  1. jbop

    2+ Year Member

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    Hey!

    I'm getting confused about this question:
    Where is the of site gastrulation initiation, as marked by the invagination of cells, in a human embryo?

    According to the notes I copied directly from Campbell's textbook, "the first sign of gastrulation is an invagination at the dorsal lip of the blastopore."

    The two confusing answer choices are:
    A) primitive streak
    B) dorsal lip of the blastopore

    datQvault says it's B, but I'm not sure if I should trust it. If you could help me, I'd appreciate it!!! (tomorrow's my last intense study day until the test!)
     
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  2. FROGGBUSTER

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    Dorsal lip of blastopore = frogs. :)
    Primitive streak = mammals and chicks.

    Are you sure the answer explanation doesn't say this? I remember that question from DATQVault and remember it did...
     
  3. OP
    OP
    jbop

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    ahaha *embarrassed*

    It says it in the explanation. In frogs it's B, in humans, it's A! Sorry!

    Thanks FROGGBUSTER!
     
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