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Which of the following best defines the mid-blastula transition (or maternal-to-

ID: 133848 • Letter: W

Question

Which of the following best defines the mid-blastula transition (or maternal-to-zygotic transition)?

time in development when genes begin to be transcribed from the embryonic genome

point in development when the primary axes become permanently established

developmental time point when an organism stops being a zygote and becomes a blastula

defines the time in which cell movements create invaginations to start placing the germ layers in order

E. developmental time point when translation is initiated

A.

time in development when genes begin to be transcribed from the embryonic genome

B.

point in development when the primary axes become permanently established

C.

developmental time point when an organism stops being a zygote and becomes a blastula

D.

defines the time in which cell movements create invaginations to start placing the germ layers in order

E. developmental time point when translation is initiated

Explanation / Answer

A. time in development when genes begin to be transcribed from the embryonic genome.

Maternal to zygotic transition in the stage in embryonic development when the zygotic genome has exclusive control over development.

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