Evolution means development. Related to humans, it means the development from animal ancestors through prehumans and early humans to present-day humans. The biological name of the species is Homo sapiens. By a “species” biology understands a community of living beings that can reproduce among themselves. What is evolution? Evolution means development. In relation to humans, … Evolution: Function, Tasks, Role & Diseases
Nuclear division (mitosis) of cells of eukaryotic organisms with replication of DNA can be divided into four main phases. The second main phase is called metaphase, during which chromosomes contract in a spiral pattern and position themselves in the equatorial plane at approximately equal distances from both opposite poles. The spindle fibers, starting from both … Metaphase: Function, Tasks, Role & Diseases
The phenotype is the outwardly visible appearance of an organism with its various characteristics. Both genetic makeup (genotype) and environment influence the expression of the phenotype. What is the phenotype? The phenotype is the outwardly visible appearance of an organism with its various characteristics. The visible expressions of an organism, but also the behavior and … Phenotype: Function, Tasks, Role & Diseases
The appearance of an organism is called its phenotype. In this context, the phenotype is shaped both genetically and by the environment. Natural phenotypic changes in an organism are usually caused by environmental factors. What is phenotypic change? Natural phenotypic changes to an organism are usually caused by environmental factors. Phenotypic changes can occur in … Phenotypic Changes: Function, Task & Diseases
The influence of genes on the human body has been the subject of intense scientific research for many years. Although great progress has already been made in decoding the human genome, there are still some controversial points: What part do genes as well as environmental influences play in the expression of certain physical and psychological … Height and Body Weight
Methylation is a chemical process in which a methyl group is transferred from one molecule to another. In DNA methylation, a methyl group couples to a specific part of DNA, thus altering a building block of the genetic material. What is DNA methylation? In DNA methylation, a methyl group couples to a specific part of … DNA Methylation: Function, Role & Diseases
Determination is a step in cell differentiation, contributing to the specialization of tissues. The process establishes a developmental program for subsequent cells and deprives omnipotent cells of the ability to generate different cell types. The more specialized a tissue is, the smaller its regenerative capacity. What is determination? Determination is a step in differentiation and … Determination: Function, Tasks, Role & Diseases
Definition Epigenetics is a broad and comprehensive biological discipline that deals with genetic functions that go beyond the mere sequencing of DNA bases. The genetic material consists primarily of DNA strands that are formed from differently arranged base pairs. In every human being there are differences in the order of the base pairs, which in … Epigenetics
Examples of epigenetics Epigenetic examples can be observed in every person in old age. Many diseases are nowadays attributed to epigenetic changes, among other things. A typical example of visible epigenetics is the so-called “X-inactivation”. Here, an X chromosome is completely silenced by epigenetic processes. This mainly affects women who have two X chromosomes. One … Examples of epigenetics | Epigenetics
What role does epigenetics play in depression? Epigenetics plays a particularly important role in the development of psychiatric diseases. The activation and inactivation of certain gene sequences can lead to diseases such as depression and schizophrenia. Age and environmental factors that lead to altered epigenetic processes are probably also responsible for this. Mental diseases are … What role does epigenetics play in depression? | Epigenetics
Definition Chromatin is the structure in which the DNA, i.e. the genetic information, is packed. Chromatin consists on the one hand of DNA and on the other hand of various proteins. The function of chromatin is the tight packaging of the DNA. This packaging is necessary because the DNA as such would be much too … Chromatin
What are the chromatin filaments? Chromatin filaments are the structures consisting of DNA and the proteins of chromatin. The DNA as such is a very long structure. The DNA consists of building blocks that are arranged in a certain order and thus store the genetic information. As the DNA is wrapped around the histones, a … What are the chromatin filaments? | Chromatin
