In this article we will discuss about the classification and origin of aneuploidy in chromosomes. Classification of Aneuploidy: Broadly, aneuploids may be divided into the following two classes (a) hypoploid and (b) hyperploid. In a hypoploid, the chromosome number is lower than the euploid number, whereas in a hyperploid it is greater than the euploid number. A detailed classification of [...]
In this article we will discuss about:- 1. Types of Duplications 2. Origin of Duplications 3. Chromosome Pairing 4. Phenotypic Effects of Duplications 5. Duplications in Human 6. Uses of Duplications. Types of Duplications: Broadly, duplications are divided into two types which are further subdivided into different subtypes. 1. Inter-Chromosomal duplication: The duplicated segment of a chromosome is present in [...]
The below mentioned article provides a note on nullisomy in chromomes. The cell, tissue or organism in which both the homologues of a chromosome are missing from the somatic chromosome complement is called nullisomic (2n-2), and the condition is called nullisomy. If two pairs of homologous chromosomes are absent, the cell, tissue or organism is known as double nullisomic (2n-2-2). [...]