Question

(a) Discuss the three ways that genetic material can be transferred among bacteria. (b)How is this achieved in eukaryotic cells?

Answer 1

1. There are three mechanisms of horizontal gene transfer in bacteria: transformation, transduction, and conjugation.

Transformation: Bacterial transformation is a process of horizontal gene transfer by which some bacteria take up foreign genetic material (naked DNA) from the environment. The prerequisite for bacteria to undergo transformation is its ability to take up free, extracellular genetic material. Such bacteria are termed as competent cells.

Transduction: Transduction is the process by which a virus transfers genetic material from one bacterium to another. Later, when one of these bacteriophages infects a new host cell, this piece of bacterial DNA may be incorporated into the genome of the new host. There are two types of transduction: generalized and specialized.

Conjugation: Bacterial conjugation is the transfer of genetic material between bacterial cells by direct cell-to-cell contact or by a bridge-like connection between two cells. The genetic information transferred is often beneficial to the recipient.

2. There are many methods for gene transfer. But most efficient is the Gene gun method. Microprojectile bombardment or gene gun is a method by which foreign substances such as DNA are introduced into living cells and tissues via high-velocity microprojectiles. Introduction.