Questions and Answers
What chromosomal condition is associated with three copies of chromosome 21?
Which syndrome is characterized by the presence of only one X chromosome?
What is the chromosomal composition of Klinefelter Syndrome?
Which of the following is a common recessive X-linked disorder?
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Why are males more affected by recessive X-linked disorders compared to females?
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Study Notes
Prenatal Genetic Abnormalities
- Chromosomal mutations can result from environmental factors, altering chromosome number or structure.
- Down's Syndrome: Caused by Trisomy 21, characterized by three copies of chromosome 21.
- Turner Syndrome: A condition resulting from Monosomy with a missing X chromosome (XO), affecting females.
- Klinefelter Syndrome: Occurs in males who have an extra X chromosome, resulting in the XXY configuration.
Sex Linked Inheritance
- Genetic disorders can be associated with genes located on sex chromosomes.
- Most prevalent form involves recessive traits located on the X chromosome, which significantly impacts males who have only one X chromosome.
- Notable Recessive X-linked disorders include:
- Red-Green Color Blindness: Affects the ability to distinguish between certain colors.
- Hemophilia: A bleeding disorder where blood does not clot properly due to a deficiency of clotting factors.
- Fragile X Syndrome: A genetic condition leading to developmental issues, including learning disabilities and cognitive impairment.
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Description
Explore the intricacies of prenatal genetic abnormalities and sex-linked inheritance. Learn about conditions such as Down's Syndrome, Turner Syndrome, and Klinefelter Syndrome, as well as how sex-linked traits affect different genders. This quiz will test your knowledge on these important genetic concepts.
