Genetics

Plant breeding started with sedentary agriculture, particularly the domestication of the first agricultural plants, a practice which is estimated to date back 9,000 to 11,000 years. Initially, early human farmers selected food plants with particular desirable characteristics and used these as a seed source for subsequent generations, resulting in an …

Introduction Plant breeding has been practised for thousands of years, since the rudiments of human civilization. It is now discussed worldwide by government institutions. Plant breeding is the purposeful manipulation of plant science in order to create desired genotypes and phenotypes for quest. This manipulation involves either controlled pollination, genetic …

If you have read the first and second part you may have understood that this is our third and final part. In this part we are going to discuss Monohybrid, dihybrid and trihybrid inheritance, Back cross and test cross and Probability in Mendelian inheritance, Chi-square test.  So let’s not waste …

In this article we will discuss (c) Life of Gregor Johann Mendel, his experiments and achievements; reasons of Mendels success. Gregor Johann Mendel who is the father of genetics, was born in 1822. In this article we will know him and his works elaborately. Life of Gregor Johann Mendel, His …

From the title we can easily understand that this article is about a part of genetics studies. So, what is genetics? The biological science which deals with the phenomena of heredity (i.e. transmission of traits form one generation to another) and variation and the study of the laws governing similarities …

In this article we will discuss the exceptions of 2nd Law. 2nd law is divided into (i) single recessive epistasis (9:3:4), (ii) Duplicate recessive epistasis (9:7), (iii) Single dominant epistasis-cumulative effect of duplicate genes (9:6:1), (iv) Duplicate gene- one incomplete dominance (12:3:1), (v) Pleiotropism.  To discuss about the topics we …

The second topic of second year Fundamental Genetics syllabus is Exceptions of Mendelism. So by the title of the article you may have understood that in this article we are going to discuss Exceptions of Mendelism. In this article we will disscuss 1st law. 1st law is divided into  Incomplete …

Transposons were first discovered in corn (maize) during the 1940s and ’50s by American scientist Barbara McClintock, whose work won her the Nobel Prize for Physiology or Medicine in 1983. The colourful pattern on maize ears have an important scientific significance. Modern research have shown that the stripes and spots …

DNA replication in eukaryotes is a complex and unique process involving many enzymes and thousands of ORI at a single time. Unlike the prokaryotic DNA, it involves a linear mode of replication. Why does linear DNA replication involve  multiple origins at a time? The large linear chromosomes in eukaryotic cell …

Following Meselson and Stahl’s work, investigators confirmed that other organisms also use semiconservative replication. There are, however, several different ways that semiconservative replication can take place, differing principally in the nature of the template DNA—whether it is linear or circular—and in the number of replication forks. Replicon and Origin of …