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Hybrid sterility can be regarded as yet another form of interspecific sterility. The offspring of the interspecific crosses are mainly sterile. Geological studies have shown that the chromosomes of the hybrid individuals fail to synapse at the time of meiosis and thus result in either non-production of gametes or defective gametes. Unless the chromosomes of parents are accurately separated which might result in viable gametes,, in most cases the gametes are not produced and if produced they may not be fertile. The commonly cited example is the mule, a sterile animal the product of a cross between a donkey and a horse. Further, the hybrid species in general are found to have grossly abnormal reproductive system. If normal reproductive system is present, then meiosis is abnormal and non-viable gametes are produced. Thus various types of reproductive isolating mechanisms are at work in different groups of organisms to maintain the distinctness and uniqueness of species.
Explain about the Deranged lipid profile? Lipids, as you are already aware, are important dietary constituents that include fats, steroids, phospholipids and glycolipids. A num
Results : In the present day, surgical mortality with or without CABG is repture to be 5-7 per cent. The late survival is 85 per cent, 75 per cent and 65 per cent at 1, 3 and 5
How cholera is generally spread in humans Associated Foods: Cholera is generally a disease spread by poor sanitation, resulting in contaminated water supplies. Sporadic cases o
Explain the Miracidium larva? Miracidium is the first stage larva that comes out from the fertilized egg. i) Miracidium is an oval, microscopic, flattened larva which appear
Does the fish heart pump venous or arterial blood? The venous blood coming from the tissues enters the atrium and passes to the ventricle that then pumps the blood towards the
Q. Assets and capital stock accounts? At the present extend the liabilities, assets and capital stock accounts in the Adjusted Trial Balance columns to the Balance Sheet column
Heat removal of Gutta percha: - Heated plugger. - Touch-N-Heat or system B used to thermo soften and remove gutta-percha from root canal systems. - The cross-sectional
What are the main harms caused by vitamin A deficiency? How does this vitamin act in the physiology of vision? Deficiency of vitamin A (retinol) might be cause night blindness
What is A biologic Failure A biologic Failure can be defined as the inadequacy of the host to establish or to maintain osseointegration. The inability to establish osseoint
Q. Can you explain Right Ventricle Enlargement? The right ventricle (RV) is roughly triangular in shape on the PA view, with a near vertical base - apex axis. When this chamber
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