Mutagens Any extracellular physical or chemical factor which can cause mutations or increase the frequency of mutations in organism is termed as mutagen. In other words, the specific factors …
Polyploidy Polyploidy is the state of a cell or organism having more than two sets of chromosomes. There are mainly three different kinds of polyploids, namely, autopolyploids, allopolyploids and …
Euploidy In euploidy the number of chromosomes is the multiple of the number of chromosomes in a single set. Euploids can be monoploid, diploids or polyploids. Monoploidy and Haploidy …
Aneuploidy Aneuploidy means presence of chromosome number which is different than a multiple of basic chromosome number. In other words, aneuploidy is the presence of an abnormal number of …
Chromosomal Aberrations Chromosomal aberrations are abnormalities in the structure or number of chromosomes which are often responsible for genetic disorders. The structural changes in the chromosomes include: Deletion or …
Crossing Over Crossing over may be defined as the recombination of linked genes brought as a result of interchange of corresponding parts between the chromatid of a homologous pair …
Linkage The phenomenon of inheritance of genes together and to retain their parental combination even in the offspring is termed as linkage. Mendel’s principle of independent assortment shows exception. …
2 Marks Questions Answer : The Mauryan empire was regarded as a major landmark in the early Indian history because for the first time Chandragupta Maurya founded a vast empire …
Pleiotropy Genes that affect multiple, apparently unrelated phenotypes, are termed as pleiotropic genes and the phenomenon is termed as pleiotropy. The term pleiotropy is derived from the Greek word …
2 Marks Questions Answer : John Marshall was the Director General of the Archaeological Survey of India. His contribution in the Indian Archaeology can be understood by the following points: …