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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.
What is the genetic code? Genetic code is the key for the conversion of DNA nucleotide sequences (and therefore RNA nucleotide sequences) into amino acids sequences that will c
What are caloreceptors
When air humidity is high does the plant transpiration increase or lower? When air humidity is high transpiration diminishes. As transpiration is a simple diffusion process it
Each ribosome having of two subunits a small subunit and a large subunit, every of that is a multi component complex of rRNAs (ribosomal RNAs) and ribosomal proteins t
Define Sample Preparation for Haemoglobin Content in Blood Wipe the index finger or middle finger with a cotton swab soaked in spirit. Prick the finger with a lancet op
Q. What are the factors Affecting Taste Quality? You may have experienced that the four primary tastes i.e., sweet, sour, salty and bitter are not sensed with an equal ease. Th
At the present level of the biotechnology what are the main techniques of genetic engineering? The main methods of genetic engineering today are: the recombinant DNA technology
Asymmetric carbon atom : a carbon atom attached with four different groups or atoms.
If a codon is CDC, what proportion of nucleotide changes in the third position result in a new amino acid? If the codon is AGG, what proportion of changes in the first position res
Which of the following is true for the kidney? A. Aquaporin1 (AQP1) channels are located in both luminal and basolateral membranes of epithelial cells in the descending limb of
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