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

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 O developmental time point when translation is initiated 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

Explanation / Answer

Q1. time in development when genes begin to be transcribed from the embryonic genome.

Mid-blastula transition is characterized by the increase in transcription of non-maternal or embryonic genome.

Q2.

Bicoid: B.Anterior-posterior axis(specifies development of anterior structures)

nanos: E. Anterior-posterior axis (specifies development of posterior structures)

dorsal: D. Dorsal-ventral axis (specifies development of ventral structures)

mirror: C. Specifies all primary axes

gurken: A. Dorsal-ventral axis(represses ventral specific genes from being activated)

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