Sometimes, there can be breakage of a chromosome. It can produce variety of arrangements. These arrangements affect the genes of that chromosome. There are following types of chromosomal structural changes:…
Any numerical or structural change in the usual chromosome complement of a cell or organism is called chromosome aberration. There are two types of chromosomal aberrations: (a) Changes in the…
Multiple Choice Questions (MCQs) ' The transfer of genetic material between bacteria through cell-to-cell contact is called bacterial. (a) Conjugation (b) Transformation(c) Transduction (d) None Episome is a: (a) Bacteria …
SUBJECTIVE QUESTION 1-What is conjugation? Explain the mechanism of conjugation. What is transduction? Describe its mechanism. What is transformation? Give its mechanism. SHORT QUESTIONS 1-What is conjugation? Is it…
TERMS DEFINITIONS Conjugation The transfer of genetic material between bacteria through cell-to-cell contact is called bacterial conjugation. Episome Episome is a plasmid of about 100 kb length that can integrate…
Transformation is the genetic alteration of a cell resulting from the introduction, uptake and expression of foreign genetic material (DNA or RNA). In 1928 Frederick Griffith transforms nonpathogenic pneumococcus bacteria…
Transduction is the process by which bacterial DNA is moved from one bacterium to another by a virus. It was first discovered by Joshua Lederberg in 1952. The most striking…
The transfer of genetic material between bacteria through cell-to-cell contact is called bacterial conjugation. It is a mechanism of horizontal gene transfer. Bacterial conjugation is often incorrectly regarded as sexual…
Multiple Choice Questions (MCQs) Phragmoplast is formed from: (a) Ribosome (b) ER (c) Golgi body (d) None Chromosomes start condensing in: (a) Leptotene (b) Zygotene (c) Pachytene (d) Diplotene The…
SUBJECTIVE QUESTIONS 1- What is mitosis? Describe its different stages. Compare the mitosis in plants and animals. Give significance of mitosis. Describe process of meiosis. Give importance of mitosis. Give…
rubab