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Natural selection can therefore mean differential reproduction among members of the sarne gene pool. We earlier said that selection would promote those alleles that give rise to phenotypes that are better adapted to a given environment. In other words, the frequencies of 'such alleles would tend to increase and those of ill-adapted ones would tend to decrease. What we are sayingis that natural selection is a matter of changes in gene frequencies. Differential reproduction has a dual role to perform. One it leads to or maintains adaptations and therefore determines whether individuals of a population or species will survive; and two, it is a process which determines what changes will occur in the frequencies of alleles in a gene pool of sexually reproducing individuals.
PITUITARY DISORDERS - (a) Pituitary Dwarfism . It is caused by the deficiency of growth hormones (GH) from childhood. It is characterised by small but well porportioned body a
Empirical validity of test procedures Reitan's great concern has always been with the empirical validity of test procedures. Such validity can only be established by the collec
Sickling occurs in deoxyhemoglobin, but not in oxyhemoglobin. Normal deoxyhemoglobin (HbA and HbS) molecules have a small hydrophobic "pocket" on the surface of a ? chain. In oxyhe
Q. What is Bigunnides? Bigunnides: They are atni diabetic drugs which do not affect the output of insulin. These are preferred to sulphony lureas because they do not cause we
Phospholipids exhibit important biological functions. They are: a) increase the rate of fatty acid oxidation b) act as inorganic ion carrier across the membrane c) hel
Q. What are fossil fuels? The Fossil fuels like coal, oil and gas, form when organic material is preserved from the complete action of decomposers, generally buried deep and un
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In the fruit fly Drosophila, a rudimentary wing called "vestigial" and dark body color called "ebony" are inherited at independent loci and are recessive to their dominant wild-typ
Ask ques different tipe tissue and ideas minimum 100 words accepted#
There is no Interphase preceding second meiotic division. There is a brief intervening period called Interkinesis During this period there may be synthesis of some reserve fo
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