Biol302 Spr2011 Lecture 4 pgs640-648

Biol302 Spr2011 Lecture 4 pgs640-648 - Transvection Zygotic...

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Transvection
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Zygotic Gene Activity in Development The differentiation of cell types and the formation of organs depend on genes being activated in particular spatial and temporal patterns.
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Zygotic Gene Expression The earliest events in animal development are controlled by maternally synthesized factors. At some point after fertilization, zygotic gene expression , or expression of genes from the embryo’s genome, begins. The initial wave of zygotic gene expression is a response to maternally synthesized factors. As development proceeds, activation of zygotic genes leads to complex cascades of gene expression.
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Body Segmentation in Drosophila Cuticle patterns -Denticle belts
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Homeotic Genes Homeotic mutations transform one segment into another; this is called homeosis . Mutation in bithorax (bx) affect two thoracic segments. Mutations in Antennapedia transform the antennae into legs.
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The Homeotic Genes of Drosophila The Drosophila homeotic genes form two large clusters on one of the autosomes. All of the homeotic genes encode helix-turn-helix
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This note was uploaded on 02/14/2012 for the course BIO 302 taught by Professor Feinstein during the Spring '11 term at Iowa State.

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Biol302 Spr2011 Lecture 4 pgs640-648 - Transvection Zygotic...

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