ANIMAL REPRODUCTION AND DEVELOPMENT
EMBRYONIC DEVELOPMENT
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cytoplasmic determinants
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inductive signals
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endosymbiotic theory
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epigenetic inheritance
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Detailed explanation-1: -Cytoplasmic determinants are also found in some post-embryonic cells, where they produce cytoplasmic asymmetry (q.v.). In dividing cells, this leads to asymmetric cell division in which each of the daughter cells differentiates into a different cell type.
Detailed explanation-2: -Moreover, cell differentiation is controlled by transcription factors, while morphogenesis is controlled by the spatial and temporal control of embryo mechanics. Also, cell movements play an important role in morphogenesis, unlike differentiation.
Detailed explanation-3: -The main role of cytoplasmic determinants is the regulation of gene expression. Due to the uneven distribution of cytoplasmic determinants within the cytoplasm, the daughter cells inherit different amounts of them during cell division. Therefore, the gene expression in daughter cells may also differ from each other.
Detailed explanation-4: -The localized cytoplasmic determinants are often mRNAs encoding transcription factors, or the transcription factors themselves.