Morphogens in Drosophila wing development Hh: a short range morphogen in wing development. The first step towards identifying and analyzing a morphogen is to determine whether a signaling molecule fulfills the criteria required to qualify as a morphogen, i.e. whether the molecule induces distinct cellular responses in a concentration-dependent manner and whether it acts directly on cells at a ... Oct 27, 2014 · Drosophila have chromosomes X, Y, 2, 3 and 4. Females are X/X and males are X/Y. Chromosome 4 is small and contains hardly any genes. Like most organisms, Drosophila have the annoying property that most genes are named after their loss-of-function phenotype, i.e. the opposite of what they do.
Measurement and evaluation in physical education and exercise science