fbpx

Tag Archives: Genetics

Linkage and Recombination (Part 2): Sex linkage in Drosophila, Linked gene & Synthetic gene

After Linkage and recombination part 1 We are going to learn from this part- Sex linkage Sex Linage in Drosophila Linked gene Synthetic gene X-linkage in Drosophila Linkage map Significance of linkage and crossing over Sex linkage Sex linkage refers to inheritance of a trait on the sex chromosomes, and …

Read More »

Linkage and Recombination (Part 1): Chromosomal Theory, Linkage & Crossing Over

Genetics is a significant branch of biology concerned with the study of genes, genetic variation, and heredity in organisms. For example, there is human genetics, mouse genetics, fruit fly genetics, etc. So, do you know where genes are located? Every single living organism of the universe consists of lively cells (except viruses), and the …

Read More »

DNA Repair Mechanism: Photoreactivation, Excision repair, Post Replication Recombinant Repair & SOS Repair

DNA damage  is defined as an alternative to DNA structures that can cause cellular injury and reduces the organisms efficiency or reproductive fitness. DNA damage may occur by free radical, physical agents like UV rays, X rays and chemical agents like aflatoxine, alkylating agents, hydraxines. Further, DNA damage is intertwined …

Read More »

Gene Cloning: Basic, Requirements & Steps

Author: Tahmina Mojumder This article discusses Recombinant  DNA  and  gene cloning, plasmid  and  phase vectors, restriction enzymes, restriction maps and their properties, recombinant selection. Recombinant DNA Recombinant DNA is the common name  for a segment of  DNA  that has been created by combining at least two  fragments from two different …

Read More »

Taxonomy: Genetic Marker

What is marker? Marker may be defined as “Mark of identification”. In Biology three major types of markers are used: Morphological marker (also called “classical” or “visible” markers) which are phenotypic traits. Biochemical markers, which are called isozymes- multiple forms of enzymes, including allelic variants of enzymes. A genetic marker …

Read More »

Cytoplasmic Inheritance: Transfer of Genetic Characters by Means of Autonomous Organelles

The genes of nuclear chromosome have a significant and key role in the inheritance of almost all traits from generations to generations,but altogether they cannot be considered as the sole vehicle of inheritance because certain experimental evidences suggest the occurance of certain extranuclear genes or DNA molecules in the cytoplasm …

Read More »