Chromosome Structural Abnormalities | Introduction | Medical Genetics

Are you ready to unlock the secrets hidden deep within our DNA? Brace yourself for a thrilling adventure into the captivating world of human genetics, where we'll explore the mysterious inner workings of the human body. At sqadia.com, we're excited to present another video that delves into the fascinating realm of Deletions, Ring Chromosomes, Duplications, Inversions, Isochromosomes, Centric Fragments, Fragile Sites, Centric Fusion, and Robertsonian. Don't be intimidated if these terms seem unfamiliar to you, because our genetics video will guide you through every step of the way. Get ready to discover the secrets behind Interstitial Deletion, Terminal Deletion, Acentric rings, Direct Duplication, Inverted Duplication, Pericentric Inversion, Paracentric Inversion, and much more. Our video is not just informative, but it is designed to be engaging and interactive to keep you hooked from start to finish. So whether you're a seasoned geneticist or just beginning your journey, join us on a thrilling adventure into the complex and intricate world of human genetics. Who knows what exciting discoveries await you on this incredible journey? The only way to find out is to watch the video and let your curiosity guide you! ▬ 📌 Chromosomal Structural Abnormalities Chromosome structural abnormalities are alterations or changes in the normal structure of chromosomes. These abnormalities can be caused by various factors, including errors during cell division, exposure to radiation or chemicals, and inherited genetic mutations. These abnormalities can lead to genetic disorders or developmental disabilities, as they may disrupt the normal functioning of genes and their regulation. Diagnosis of Chromosome structural abnormalities is often done through genetic testing, which can involve analyzing chromosomes in cells obtained from blood or other tissue. Conditions are of particular importance in this regard: 🟠 Translocations 🟠 Reciprocal Translocations 🟠 Insertional Translocations 🟠 Fragile Sites 🟠 Isochromosomes 🟠 Inversions 🟠 Duplications 🟠 Ring chromosomes 🟠 Deletions ▬ 📌 Chromosomal Translocations A translocation involves the transposition of chromosome material usually between chromosomes. Chromosomal translocations are genetic abnormalities that occur when a portion of one chromosome breaks off and becomes attached to another chromosome This can result in changes to the genes located on those chromosomes, which can lead to a variety of health problems. Three types are recognized which are: 🔵 Centric fusion or ‘Robertsonian’ 🔵 Reciprocal Translocation 🔵 Insertional Translocation 👉 Centric Fusion Translocation Centric fusion translocation, also known as Robertsonian translocation, is a type of chromosomal translocation that occurs when two acrocentric chromosomes (chromosomes with a centromere close to one end) join together at their centromeres, resulting in a single fused chromosome. Centric fusion arises from breaks at or near the centromeres of two chromosomes, followed by their fusion. 👉 Reciprocal Translocation Reciprocal translocation involves intrachromosomal exchange. in a reciprocal translocation, two chromosomes break at different points, and the broken ends then reattach to the opposite chromosome. This results in a reciprocal exchange of genetic material between the two chromosomes. The total amount of genetic material on the chromosome remains the same, but it is rearranged between the two chromosomes. 👉 Insertional Translocation Insertional translocation involves the insertion of a deleted segment interstitially at another location. Insertional translocation is a type of chromosomal translocation that occurs when a piece of one chromosome breaks off and becomes inserted into another chromosome. This type of translocation can cause gene disruption, altered gene expression, and genetic disorders. ▬ 📌 Chromosomal Deletion Chromosomal deletion is a type of genetic mutation that occurs when a portion of a chromosome is lost or deleted. This can result in a loss of genetic material and lead to various health problems, depending on which genes are affected. Deletion of part of a chromosome can be: 🟠 Interstitial Deletion 🟠 Terminal Deletion 👉 Interstitial Deletion Interstitial deletions can arise from two breaks, followed by faulty repair, from unequal crossing-over in a previous meiosis, or because of a translocation in a parent. Interstitial deletion is a type of chromosomal deletion that occurs when a segment of genetic material is deleted from the middle of a chromosome, rather than at the end of the chromosome (which would be a terminal deletion). This results in the loss of genetic material, which can lead to various health problems, depending on which genes are affected. ▬ 🎬 5500+ sqadia.com Medical Videos ▬▬▬▬▬▬▬▬▬▬ 👩🏻‍⚕️ Accessible Medical Student Education 24/7/365 💡 Simplifying Medical Learning 💪 Study Hard, Dream Big, Achieve More