The cells of triploid animals, like certain salamanders, are individually larger, yet their overall body size is no different from that of diploids. Pose a developmental hypothesis for the control of morphogenesis in such animals
What will be an ideal response?
The increase in cell size with no concomitant increase in body size means that the triploids produce fewer cells for the same body size. Intercellular signals are important in morphogenesis, so perhaps size and shape of tissues and organs is sensed and communicated by chemical signals generated, say, when certain cell types come in contact. A certain size or dimension would be reached sooner with larger cells, triggering the next set of developmental genes and preserving overall body dimensions.
You might also like to view...
One of the ways agricultural production of such fruits as tomatoes or cucumbers can be increased significantly is to grow them in:
A. soils rich in magnesium. B. soils rich in nitrogen. C. greenhouses supplied with extra carbon dioxide. D. greenhouses with extra oxygen. E. None of these is true.
Which of the following is a correctly stated condition that must be true for a population to be in Hardy-Weinberg equilibrium?
a. There must not be random mating. b. There must be a benefit of one genotype over another. c. The population must be large. d. There must be mutations within the population.
Which of the following is the correct way to write the scientific name of this bacterium?
A. Staphylococcus Aureus B. Staphylococcus aureus C. Staphylococcus Aureus D. S. Aureus E. Staph Aureus
Based on this figure, if a plant and non-plant mitochondrial genome contains the same gene, does it have a common ancestor? Why or why not?
What will be an ideal response?