ANTERIOR-POSTERIOR AXIS FORMATION IN DROSOPHILA (PART-3) | CSIR NET |DEVELOPMENTAL BIOLOGY

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TOPIC-ANTERIOR-POSTERIOR AXIS FORMATION IN DROSOPHILA (PART-3) | CSIR NET |DEVELOPMENTAL BIOLOGY

MATERNAL GENES- Maternal genes are expressed in oocytes before fertilization.Two maternal mRNA Bicoid and Nanos help in forming anterior and posterior.
The bicoid mRNAs are located in the anterior portion of the unfertilized egg.The nanos mRNAs are posterior region of the unfertilized egg.The hunchback and caudal mRNAs are distributed throughout the oocyte.Upon fertilization, these mRNAs can be translated into proteins.The building-blocks of anterior-posterior axis patterning in Drosophila are laid out during egg formation (oogenesis), well before the egg is fertilized and deposited. The maternal effect genes are responsible for the polarity of the egg and of the embryo. The developing egg (oocyte) is polarized by differentially localized mRNA molecules.

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