Figure 1: Tip of polythene Chromosome of D. Melanomas showing banding Figure 2: Polythene Chromosome of D. Melanomas with chromosome arms labeled (approximately) From figure 2, I can observe that the bands of the chromosome are irregularly spaced with varying band widths I did not see any puffs. I observed that the chromosomes of D. Melanomas were much larger in size and easier to study than human chromosomes. Discussion observed that polythene chromosomes had formed just like my prediction. This result supports my hypothesis that endometriosis has occurred.
I observed that polythene chromosomes were big, light and had dark banding patterns with all homologous pairs of chromosomes connected to chronometer similar to Abidance’s observation in his 1977 paper. The disadvantage of the method used was that the extraction process was very hard and without lots of practice is a not practical method for fast good results. The biological significance of endometriosis is not fully and properly understood but scientists have hypothesized the following factors for its occurrence – cell size and fermentation, embryonic development, and as a response to stress.
When I compared the metastases chromosomes of D. Melanomas and human, the chromosomes of D. Melanomas were huge and easy to study compared to that of the human. However, the chromosome of human which is very small in size to that of D. Melanomas, is the one that is considered as normal size for a chromosome. References Biology Department. 2014. Laboratory Manual for Introductory Genetics. Ottawa: Carleton University. Bridges, Calvin B. 1938. A Revised Map of the Salivary Gland X-Chromosome of Drosophila Melanomas.
The Journal of Heredity. 29 (1): 11-13. Painter, Audiophiles S. , Reindeer, Elizabeth C. 1940. Endometriosis in the nurse cells of the ovary of drosophila Melanomas. Chromosomal. 1(1):276-283 Baddish, W. 1977. Bilabial ring pattern and biochemical activities in the salivary gland of Acrimonious lucid (Chronometer).