Apoptosis vs Necrosis Apoptosis and Necrosis Apoptosis and Necrosis are two types of cell death occur in organisms. The cells undergo death when the cell death becomes necessary as a part of developmental process or they fail to adapt to injuries. Both these types of cell deaths differ in their […]
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Nucleosome Model of Chromosomes in Eukaryotes (Short Notes)
Does the DNA really need to FOLD inside the nucleus? A diploid human cell contains approximately 6.4 billion base pairs. These 6.4 billion base pairs are distributed in our 23 pairs (2n = 46) of chromosomes. We know that each chromosome contain a single linear segment of DNA. According to Watson […]
Continue ReadingFolded Fibre Model of Chromosomes
The Folding Mystery of Chromosomes The chromosomes of eukaryotic organisms are a complex structural organization of DNA and proteins. The exact structural organization of proteins and DNA to form the chromatin material (or chromosomes during cell division) is a curious question in the scientific community. This curiosity becomes a wonder […]
Continue ReadingKaryotype and Idiogram: Definition and Importance of Karyotype Test (Karyotyping) in Human
What is a Karyotype? All species are characterized by a set of chromosomes to carry their genetic information. The chromosomal composition of each species has a number of characteristics. The Karyotype is a set of characteristics that identifies and describes a particular set of chromosome. These characteristics which are described […]
Continue ReadingClassification of Chromosomes based on Position of Centromere and Length of Chromosomal Arms
The size and shape of the chromosomes are variable in the different phases of cell cycle. Chromosomes in the interphase of cell appear as thin, coiled, elastic and thread-like structures. This thread-like stainable interphase chromosome is called chromatin. During the mitotic or meiotic cell division, the chromatin materials become thicker […]
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