genetics - Page 3

Causes of chromosomal aberration | Chromosomal aberration – What is meant by this?

Causes of chromosomal aberration There are different causes for the numerical and structural chromosomal aberrations. The numerical chromosomal aberration has a different number of chromosomes, but the chromosomes themselves look normal. In aneuploidy, single chromosomes are duplicated or missing, as in trisomy 21, for example, the most common cause is non-disjunction of chromosomes during meiosis. … Causes of chromosomal aberration | Chromosomal aberration – What is meant by this?

CLINICAL: Which diseases are caused by chromosomal aberration? | Chromosomal aberration – What is meant by this?

CLINICAL: Which diseases are caused by chromosomal aberration? Chromosomal aberrations are responsible for a large number of spontaneous abortions before birth and for many diseases. Of all of these, five diseases in particular are widespread. The best known of these is trisomy 21, better known as Down’s syndrome. These children are conspicuous for their short … CLINICAL: Which diseases are caused by chromosomal aberration? | Chromosomal aberration – What is meant by this?

Causes of ADHD

Hyperactivity, attention deficit hyperactivity syndrome, ADHD, attention deficit disorder with hyperactivity, fidgeting syndrome, attention deficit hyperactivity disorder. Attention Deficit Syndrome, Psychoorganic Syndrome (POS), Hyperkinetic Syndrome (HKS), Behavioural Disorder with Attention and Concentration Disorder. English: Attention-Deficit-Hyperactiv-Disorder (ADHD), minimal brain syndrome, Attention – Deficit – Hyperactivity – Disorder (ADHD), Fidgety Phil. ADHS, attention deficit syndrome, Hans-guck-in-the-air, Attention-Deficit-Disorder … Causes of ADHD

Neurological causes | Causes of ADHD

Neurological causes Many factors contribute to the development of ADHD, including changes in the brain. Studies have shown that the signal transmission by means of various messenger substances, e.g. dopamine, is disturbed in ADHD patients. This is due, among other things, to a disturbance of the receptors and transporters of these substances, which is hereditary. … Neurological causes | Causes of ADHD

Frozen section analysis | Histology

Frozen section analysis This is necessary if the surgeon needs information about the tissue removed during an operation in order to decide on the course of the procedure. For example, a small malignant tumor is removed from the kidney. Now a quick incision is required to see whether the tumor has been completely removed or … Frozen section analysis | Histology

Histology

Synonym Microscopic Anatomy Definition – What is histology actually? The word histology is composed of the word “histos”, which means “tissue” in Greek and the Latin word “logos” for “doctrine”. In histology, i.e. “tissue science”, people use technical aids such as a light microscope in everyday life in order to recognize the structure of various … Histology

Amplification: Function, Tasks, Role & Diseases

Amplification means the multiplication of segments of deoxyribonucleic acid (DNA). These can be molecules, individual genes, or even larger parts of the genome. Amplification occurs as a natural duplication of sequences of DNA as the carrier of hereditary information. Thus, it is one of the most important categories in the theory of heredity (genetics). What … Amplification: Function, Tasks, Role & Diseases

Bloch-Sulzberger Syndrome: Causes, Symptoms & Treatment

Bloch-Sulzberger syndrome is an X-linked dominant inherited disorder that is very rare. The disorder is characterized by a range of neurologic and cutaneous symptoms. Bloch-Sulzberger syndrome is synonymously referred to as both Bloch-Siemens syndrome and melanoblastosis cutis. What is Bloch-Sulzberger syndrome? Bloch-Sulzberger syndrome is inherited in an X-linked manner and for this reason occurs predominantly … Bloch-Sulzberger Syndrome: Causes, Symptoms & Treatment

Telomeres

Definition Telomeres are part of every DNA. They are located at the ends of chromosomes and in no case code for genes. Unlike the rest of the chromosome, telomeres do not have double-stranded DNA. They are present as a single strand. In contrast to the rest of the DNA, they also do not exhibit a … Telomeres

Diseases of the telomeres | Telomeres

Diseases of the telomeres Diseases of the telomeres can have serious consequences. In most cases, such subsequent effects are caused by damage to the DNA coding for proteins. Telomere disease is most often caused by a deficiency in the protein complexes (shelterins) that surround the telomeres, or in the enzyme telomerase. This promotes a disturbance … Diseases of the telomeres | Telomeres

What role do they play in the development of cancer? | Telomeres

What role do they play in the development of cancer? Telomeres can also play an essential role in the development of cancer. More often, however, the cause of cancer is a mutation within the DNA strand. However, shortening plays a role in the development of cancer as it does in aging. In the context of … What role do they play in the development of cancer? | Telomeres

Can the telomeres be influenced by nutrition? | Telomeres

Can the telomeres be influenced by nutrition? Among some doctors and researchers, it is considered proven that nutrition influences the telomeres. Several studies have already been carried out on this, but some of them are controversial. A healthy diet should increase the activity of telomerase, so that the shortening of the telomeres during cell division … Can the telomeres be influenced by nutrition? | Telomeres