Gene expression pre and post-hatch. A. Hierarchical clustering of the 889 genes whose expression is significantly different (ANOVA, p < 0.01) between pre-hatch (stages 1-35) and post-hatch (stages 36-40) embryos. Red indicates high expression levels and green represents low expression levels. Clusters of genes with similar expression patterns are shown on the left (gene tree). The fold-change scale refers to differences in gene expression between pre- and post-hatch embryos. B. Enlargement of a subset of genes with high expression levels post-hatch. Thirteen unannotated genes are not included in the enlargement. C. Significance of pre and post-hatch expression levels. Significances of differences as - log10(p-values) are plotted against log2 differences in expression of pre and post-hatch embryos. The colors of the points correspond to the colors of the gene tree in 3A.