Which of the following is a process by which an initial set of genes turns on a second set of regulatory genes,which eventually turns on a third set of genes?
A) developmental chain reaction
B) gastrulation
C) the sonic hedgehog sequence
D) the genetic cascade
E) somite production
Correct Answer:
Verified
Q1: Which of the following is a morula?
A)a
Q2: Of the choices listed,the first event that
Q3: Which is true regarding somites in an
Q4: In sea urchin development,the archenteron becomes the:
A)ectoderm.
B)endoderm.
C)digestive
Q6: Migration of which of the following to
Q7: The blastocoel is:
A)a fertilized egg.
B)the group of
Q8: During which stage of development do cells
Q9: The phase during which embryonic cells arrange
Q10: At which of the following levels does
Q11: Place the following steps of organogenesis in
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