Polygenic inheritance refers to the kind of inheritance in which a single inherited phenotypic trait is produced and controlled by multiple genes. It is also known as quantitative or multi-factorial inheritance. Each gene contributing for a particular trait in polygenic inheritance has a small but addictive effect individually and exhibit incomplete dominance unlike Mendelian … Read more
Ecological succession is the gradual process through which ecosystems change and develop over a given time frame. This process occurs in no particular direction and aims at establishing a stable community. The resultant final community is, therefore called the climax community. Seral stages are the individual stages of succession, they are not discrete but a … Read more
Chemical Kinetics: Integrated rate equations and half-life Rate law can be defined in two formats with the help of calculus. Differential Rate Law shows how the reaction rate changes with concentrations. Integrated Rate Law shows how the concentrations of species in the reaction change with time. Because the differential and integrated rate laws for a … Read more
Alkynes – the acidic character of alkynes Acetylene and other terminal alkynes are weakly acidic in character. They react with strong bases like sodium metal at 475 K or sodamide, to form sodium acetylide derivatives known as acetylides or alkynides with the liberation of hydrogen gas as shown here: These reactions have not been observed … Read more
Ecological Services The plants provides us with the essential services we have a tendency to need for life. These services are called ecological services – the interactions among organisms and their natural environments, including the cycling of water and basic nutrients that humans are able to use and capitalize on. Ecological services include: Purification of … Read more
Adaptation is the evolutionary process by which organisms become fitted to their environment as a result of natural selection. Natural selection acts upon organisms over several generations enabling them to develop adaptive traits with a role in these organisms. Such traits enable organisms to fit into their specific environment. Types of Adaptations There are three … Read more
Down syndrome as a disorder in genetic in human being occurs when an error in cell division results in an extra chromosome 21. Down syndrome affects physical growth and a person’s cognitive ability, cause mild to moderate developmental issues, which usually result in a health problem. With the help of a series of screenings … Read more
In the year 1898, Sergius Nawaschin seconded a few months later by Leon Guignard(1899) suggested that fertilization is double in Lilium martagon and Fritillaria tenella. It was then believed that indeed it occurs in flowering plants. This is a complex fertilization mechanism that occurs in angiosperm (flowering plants). It involves the joining of a … Read more
Introduction DNA replication is the biological process involved in the production of two identical replicas of DNA from an original DNA molecule. It is, therefore, the basis of biological inheritance and thus occurs in all living organisms on Earth. During each cell division, two daughter cells are formed, which must contain the same genetic … Read more
Introduction. Cell division is an essential part of any multicellular organism. The main reason for cell division is to make sure each daughter cell receives a copy of every chromosome. DNA being the blueprint for the building of cells, the slightest error could result in disease or death; therefore, a cell has set aside … Read more