The eyes of insects and the eyes of vertebrates were, until the early 1990s, considered to be a standard example of "analogous" structures. They perform the same function but have utterly different internal structures, suggesting that they evolved independently from a common ancestor that lacked eyes. Then the laboratory of Walter Gehring in Switzerland began to research genes that are [...]
In this essay we will discuss about the factors influencing allele frequency. Essay on Allele Frequency Essay Contents: Essay on Selection Essay on Mutation Essay on Meiotic Drive and Migration Pressure Essay on Random Genetic Drift Essay on Founder Principle Essay # 1. Essay on Selection: I. Evolution: Evolution has been described by Lewontin (1967) as a process that converts [...]
In this essay we will discuss about the Hardy-Weinberg law of population genetics. The formula (p + q)2 = p2 + 2pq + q2 is expressing the genotypic expectations of progeny in terms of gametic or allelic frequencies of the parental gene pool and is originally formulated by a British mathematician Hardy and a German physician Weinberg (1908) independently. Both [...]