Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Chromosomes and Their Organization
During division phase , the duplicated chromatin fibres become extremely shortened (= condensed), by coiling and folding ,into short think and microscopically visible rod like structures of various shapes and sizes, It is necessary to learn about these structures before dealing with the sequential changes of mitosis. These structures werer observed first by Naegeli 1842 and later by russow 1872 and Balbiani 1876 waldeyer 1888 named these, chromosomes gr.khroma =coloured + soma =body ) because these take a dark stain when treated with basis dyes.
Karyotype :Beneden 1888 discovered that the chromosomal pattern is a specific character .i.e. each species has its own chromosomal complement different from those of all other species ,This complement of a species is called its karyotype .It implies that in all cells membrane of a plant or animals species, not only the number of chromosomal is the same but even the shapes sizes, and structure of the various chromosomes in the set are the same .The chromosomal number varies from 10 to 50 in most of the species, The smallest number is however two found in a nematode subspecies ascaris megalocephala univalence, and the largest number is 1600 in aulacantha ( a radiolarian protozoan ) To quote a few examples the chromosomal number is 46 in man ( Homo sapiens ) 32 in Hydra vulgaris. 12 in housefly (Musca domestica ) 26 in frog (Rana pipiens ) in rabbit, (Oryctolagus cuniculus ) 38 in cat (Felish domesticus ) 78 in dog (cains familiaris) 80 in pigeon (Columba livia) 8 in fruitfly ( Drosophila melanogaster ) in mosquito ( Culex pipiens ) and so on.
List a few applications of starches in the food industry. A few applications of starches in the foods industry include thickener, a fat sparing agent, adhesive, binder,
Q. What do you mean by Descending Aorta? The descending aorta begins at the level of the fourth thoracic vertebra. It is defined through the cardiac shadow on the CXR, as it l
Mr. Jones I.V. was hung at noon. It is a liter bag and is infusing at 65 ml/hr. How many hours will this bag last?
WHERE DOES LIZARD LIVE
how twins are produced and why
How to repair the defects in post myocardial ? Repair of Defect : The approach to the defect is through ventriculotomy over the infarcted area. The defect is repaired
What is Joints Joints are locations where two or more bones come together, or articulate. Bones are joined with varying degrees of rigidity. Joints may be fixed, as in the s
Formation of New Membranes Divisions of the egg or blastomeres raise the total surface area of the two daughter cells to be covered via membrane at every cleavage. The parent
What are vitamins? What are the main vitamins needed by humans? Most vitamins are coenzymes (fundamental substances for the enzyme functioning) that are not formed by the organ
TYPES OF BLASTULA - Blastulas are of following type - 1 . STEREOBLASTULA - The blastocoel is very small. It's blastomere are less in num
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd