Youtor
Faces of Turner Syndrome
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=0qlY8gYFv1E
Non disjunction | Explain Down, Klinefelter and turner syndromes Class 12 Biology • About This Video ........................ • In This Video Lecture You Will Learn Basic Concept Non Disjunction • Meiosis is an orderly occurring phenomenon, which ensures every phase with • Autosomal non-disjunction may occur in other than 21st chromosome which usually • developed secondary sex characters. • Some examples of each type may be discussed below in some detail. • increase or decrease in the number of chromosomes, causing serious physical, social • skin fold in the inner corner, and protruding tongue, mental retardation, and defective • autosomes + XXXXY) and with 47 chromosomes (44 autosomes + XYY) are also observed • chromosomes fail to segregate during anaphase and telophase and do not finish with • chromosomes. Non-disjunction appears to occur in the ova and is related to the age of • development of central nervous system. • These individuals have additional sex chromosome e.g., 47 chromosomes (44 • .autosome + XXY). They are phenotypically male but have frequently enlarged breasts, • three times greater. The affected individuals have lat, broad face, squint eyes with the • Males with 48 chromosomes (44 autosomes + XXXY), with 49 chromosomes (44 • mother. The chances of teenage mother having Down’s syndrome child is one in many • equal distribution of chromosome among all the daughter nuclei. This results either • When this gamete, fertilizes normal gamete the new individual will have 47 (2n + 1) • abnormalities.One of such abnormalities is chromosome non-disjunction, in which • ‘tendency to tallness, obesity, small testes with no sperms at ejaculation and under • appropriate finish, but some times, at any point the result may be unexpected, causing • 21st pair of chromosome fails to segregate, resulting in gamete with 24 chromosome. • results in abortion, or death in very early age. • It is one of the consequences of autosomal non-disjunction in man, during which • These affected individuals have one missing X chromosome with only 45 •chromosomes • thousands, forty years old mother, one in hundred chances and by forty-ive the risk-is • Klinefelter’s Syndrome • Down’s Syndrome (Mongolism) • Turner’s Syndrome • are aborted. Those who survive have female appearance with short stature, webbed • and mental disorders. This non-disjunction may be in autosome or in sex chromosome. • (44 autosomes + X). Individuals with this condition often do not survive pregnancy and • neck, without ovaries and complete absence of germ cells. • About This Channel..................... • I make these videos cause I love to draw and connect the complexity of science and medicine into art. I'm not saying. I'm 100% correct in all my videos, but I do try to obtain the information from credible sources. • One-stop destination for all biology lectures. • _ students in class 11, 12 or appearing for competitive medical exams ( NMDCAT ) will find it very beneficial • _ The videos are categories under various heading to make the students life simplified • Visit My Other Channel Playlist ..................... • NMDCAT PART 1: • New 1st Year Biology • NMDCAT PART 2: • New 2nd Year Biology • Class 11th Lectures: • New 1st Year Biology • Class 12th Lectures: • New 2nd Year Biology • Class 10th Lectures: • • Matric Biology • Subscribe My Channel: • / aliacademya7r • Social Link........................ • Instagram: • https://instagram.com/ranaalibiologis... TWINS
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