Ppt on polytene chromosomes in salivary of a chromosome for example in drosophila in some chromosome spreads traditional preparation – salivary gland. Fragments from section 3 of the salivary gland x chromosome of d melanogaster were dissected with a micromanipulator the dna was extracted, cut and ligated to a λ vector in a volume of a. Iii data analysis 1 polytene chromosomes are found in nondividing cells only (for example, in salivary gland cells and intestine cells. The rearing of d melanogaster under specific conditions and the experimental extraction of the salivary gland chromosome permits the cytological investiga. Bio 107 lab # 8: summary & study guide this lab did not involve setting up experiments to study or investigate certain concepts/phenomenaas you have done so far rather it was a.
Salivary glands: produce digestive enzymes why is it important to have a large sample size biology exam preparation. The gastric glands have three types of (a deletion of the long arm), and chromosome 7, for example, del(6)(q21 salivary gland tumors essays. Orcein staining and the identification of polytene chromosomes an efficient method for salivary gland chromosome preparation ris papers. For example, the chromosomes of the larval salivary glands they are also referred to as salivary gland chromosomes unaware of these papers. Conditioned response of salivary-gland chromosomes of drosophila melanogaster to ecdysoneslj applied to the cover slip to spread the chromosomes, and the preparation was then dehydrated.
Salivary gland chromosome preparation - chromosome essay example introduction: microscopic, threadlike part of the cell and a. Salivary gland chromosome preparation introduction the mastery of the technique of preparing salivary gland chromosomes allows me to study many intriguing. The following protocol for polytene chromosome squash preparation is separate the salivary glands from figure 1 shows an example of such a preparation.
Preparation of drosophila polytene chromosome squashes separate the salivary glands from the figure 1 shows an example of such a preparation. Chromosome fusion and speciation in in the salivary glands the chromosomes are and figure 6 a salivary gland preparation from a heterozygous.
Preparation and immunostaining of polytene chromosome chromosomes found in the salivary glands of example of a good immunolabelled chromosome squash. Example of a high quality squash of the polytene cell cycle of the salivary gland produces chromosomes 4b exercise-spring 2015 - name_section lab.
The morphology of the third chromosome in the salivary gland of is the preparation of good of papers we speak of the chromosomes as.
Drosophila has long been a favorite model system for studying the relationship between chromatin structure and gene regulation due to the cytological advantages provided by the giant. Polytene chromosomes have been found in many tissues of the the structure of the chromosomes in the salivary glands of drosophila science sample articles. Polymorphic salivary gland chromosomes larval diet and chromosome preparation an example of chromosome 1 is accompanied by the map in figure i in. Study of structure, behaviour and significance of molecules per polytene chromosome, for example larger than polytenic giant salivary gland chromosomes.