Found 2 Articles for Chromosomes

Difference between Homologous Chromosomes and Sister Chromatids

Vineet Nanda
Updated on 18-Apr-2023 17:31:04


In eukaryotes, chromosomes are fixed, self-replicating components of the cell nucleus. DNA and chromosomes carry genetic information from one generation to the next. Depending on the species, the number of chromosomes might be different. Humans, like many other animal and plant species, are diploid creatures (2n), meaning that the chromosomes are organized into sets of two. By using an optical microscope, scientists can observe chromosomes as they duplicate (metaphase). Each metaphase chromosome is made up of two components termed sister chromatids. They're both identical since DNA is copied throughout cell division. What are Homologous Chromosomes? Homologous chromosomes are present in ... Read More

What Are Chromosomal Aberrations?

Updated on 31-Mar-2023 10:46:27


Introduction A change in chromosome number or a change in the shape or destruction of a part of a chromosome can cause chromosomal aberration. An improper cell cycle and cell division results in chromosomal aberration. Chromosomal aberration can lead to the loss of functional genes or the addition of a few functional genes hence the addition of some characters in the case of aneuploidy. The major reason for chromosomal aberration among many others includes errors during cell division (that is during Mitosis and Meiosis). In case of errors during mitosis division, it occurs in somatic chromosomes, while errors during ... Read More