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Q. What do you understand by Chromosome Behaviour?
When we study meiosis. we not only observe the regularity of pairing which is important' for' the fertility of the plants, we are also able to make a chromosome to chromosome comparison. This provides valuable information about the role of chromosomes in heredity. Taxonomists use this information to understand relationships amongst different species of plants. We can also determine the nature of the genome to find out if it is homozygous or heterozygous. Genome analysis in plant taxonomy has been particularly useful in understanding polyploidy add for establishing the parentage of polyploids. A very significant study in this regard is the case of the common hexaploid bread-wheat, Triticum ;aestivum. The genome of this economically important plant has been designated as AABBDD with 2n = 42 chromosomes. Detailed genome analyses have established that 3 diploid species have configured to the evolution of this hexaploid wheat. The A genome is from the diploid Triticum monococcum (2n = 14), the B genome is from a wild grass Aegilops speltiodes (2n = 14), and the D genome has been contributed by Aegilopssquarrosa (2n = 18).
Finally, we must remember that as with any other character, the value of 'cytotaxonomic data depends upon the group or category ,under investigation. A combination of cytological information with data from other disciplines will provide 'a more useful tool to the taxonomist.
Haemocyanin - Respiratory Pigments This pigment is found in several arthropods and molluscs. Haemocyanins do not consist of haee groups. The metal they consist of is copper, w
Check Screws- Check screw access holes for closure. If screw access holes are uncovered, such as the bar-retained dentures, make sure that are free from debris. If screws can b
Citric Acid Cycle The citric acid cycle, also known as tricarboxylic acid (TCA) cycle, lies at the heart of aerobic metabolism. it is involved in the breakdown of all three maj
Results of Monohybrid Crosses Mendel got the following results from his monohybrid crosses :- 1. F 1 plants produced by a cross between two plants pure for the cont
Explain Chlamydia A single 1 g dose of azithromycin (Zithromax) or 7 days' treatment with a tetracycline are both effective for treatment of uncomplicated urethral or cervical
Determine the Adequacy of children's food? Adequacy of children's food and nutrient intake depends on: Sibling company Peer pressure Model set by parents and
Explain the Radiographic Success of Root Canal Treatment Elimination or lack of development of an area of rarefaction (= Radiolocency ) for a minimum of I year after treatment
who discovered it? and what is it''s physiologic functions?
Augmentation Therapy: The functional gene is introduced in addition to the defective gene endogeneous to the cell(s) in this somatic cell gene therapy, i.e. the improved cell
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