coordination no is the no of ligands in the coordination sphere and in this case it is 6 Solution coordination no is the no of ligands in the coordination sphere and in this case it is 6.

1. a. Germ cell speciication in Drosophila is primarily a maternlly contributed determinant.
Primordial germ cells are the progenitar cells that give rise to gametes. In Drosophila, the
primordial germ cells specification occurs via inheritance of maternally provided gene products
known as germ plasm. The gene responsible for germ cell specification in Drosophila is 'vasa'
gene.
b. Neural crest cells undergo a cell-cell speicifaction inhieritamce. Underlying development of
the neural crest cells is agene regulatory network, described as set of interacting signals,
transcription factors and downstream effector genes that confers cell characteristics. Two neural
crest effector genes are Rho GTPases and cadherins.
c. The genes involved in the Anterior/posterior border specification in Drosophila wing imaginal
disk are gap genes, pair rule genes. It is a maternally inherited determinant.
Solution
a. Germ cell speciication in Drosophila is primarily a maternlly contributed determinant.
Primordial germ cells are the progenitar cells that give rise to gametes. In Drosophila, the
primordial germ cells specification occurs via inheritance of maternally provided gene products
known as germ plasm. The gene responsible for germ cell specification in Drosophila is 'vasa'
gene.
b. Neural crest cells undergo a cell-cell speicifaction inhieritamce. Underlying development of
the neural crest cells is agene regulatory network, described as set of interacting signals,
transcription factors and downstream effector genes that confers cell characteristics. Two neural
crest effector genes are Rho GTPases and cadherins.
c. The genes involved in the Anterior/posterior border specification in Drosophila wing imaginal
disk are gap genes, pair rule genes. It is a maternally inherited determinant.