Biology Inheritance Principle part 43 (Down's, Turner's , Klinefelter's Syndrome) class 12 XII | Summary and Q&A

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May 11, 2015
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Biology Inheritance Principle part 43 (Down's, Turner's , Klinefelter's Syndrome) class 12 XII

TL;DR

This video discusses the causes, symptoms, and implications of chromosomal disorders such as Down Syndrome, Kleinfelter Syndrome, and Turner Syndrome.

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Questions & Answers

Q: What causes Down Syndrome?

Down Syndrome is caused by the presence of an extra copy of chromosome 21, resulting in abnormal chromosome number and gene expression.

Q: Why is Kleinfelter Syndrome only seen in males?

Kleinfelter Syndrome is only seen in males because it involves an extra X chromosome, which requires a Y chromosome for male gender development.

Q: How does non-disjunction during gametogenesis lead to chromosomal disorders?

Non-disjunction during gametogenesis can result in the production of gametes with abnormal chromosome numbers, leading to disorders such as Down Syndrome, Kleinfelter Syndrome, and Turner Syndrome.

Q: What are the symptoms of Turner Syndrome?

Symptoms of Turner Syndrome include infertility, short stature, absence of menstrual periods, obesity, webbed neck, ear infections, and visual impairments.

Summary & Key Takeaways

  • Down Syndrome is a genetic disorder caused by the presence of an extra copy of chromosome 21, resulting in physical and mental abnormalities.

  • Kleinfelter Syndrome is a genetic disorder characterized by the presence of an extra X chromosome in males, leading to both masculine and feminine characteristics.

  • Turner Syndrome is a genetic disorder in females caused by the absence of an X chromosome, resulting in infertility and physical abnormalities.

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