Zool 430 (Animal Development) Copy A Exam2 (UH B 34. Statement 1. Gray crescent

Question

Zool 430 (Animal Development) Copy A Exam2 (UH B 34. Statement 1. Gray crescent is believed to be not essential for normal development; blastomeres not containing the "gray crescent" develop into normal animal. Statement 2. Ifyou inhibit Noggin, Chordin, & Follistatin, all are BMP antagonists, that region of the amphibian emberyo will be specified as ventral a. Both statements are true b. Both statements are false e. Statement I is false and statement 2 is true d. Statement 2 is false and statement 1 is true

Explanation / Answer

34) C is right option that is - statement 1 is false and statement 2 is right

statement 1 is false because grey crescent region is very important for animal development. it contributes to the animal polarity dfines first in the animal development and also blastomeres have this and first cleavage planes devides grey crescent into two equal halves if any half is lacking that part is not able to make complete animal.

while statement 2 is true because all the BMP antagonists bind to the BMP receptor so dorsalize the embryo.

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