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What is the risk factor for Turner syndrome?
XYY syndrome is caused by a random mix-up during the formation of male's genetic ___.
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What genetic condition is characterized by an extra Y chromosome in males?
XYY syndrome
Men with XYY syndrome are likely to pass the condition to their male offspring.
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Match the signs of XYY syndrome with the symptoms:
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Study Notes
Y Chromosome Material and XYY Syndrome
Risk Factors and Complications
- All males are at risk for XYY syndrome, which is not inherited.
- Complications include:
- Heart problems (aortic valve stenosis, aortic dissection)
- Increased risk of cardiovascular diseases (high blood pressure and diabetes)
- Hearing loss (frequent middle ear infections)
- Kidney problems (malformation of the kidneys leading to high blood pressure and urinary tract infections)
Causes and Characteristics of XYY Syndrome
- XYY syndrome occurs when a male's genes have an extra Y chromosome in each cell.
- Caused by a random mix-up during the formation of the male's genetic code.
- Men with XYY syndrome may have some cells with XY chromosomes and others with XYY chromosomes.
Signs and Symptoms in Teenagers
- Autism diagnosis
- Inability to grow facial or body hair
- Attention difficulties
- Delayed motor skill development (e.g., writing)
- Delayed or difficult speech
- Delayed or absent puberty
- Emotional or behavioral issues
- Gynaecomastia
- Hand trembling or involuntary muscle movements
- Hypogonadism
- Hypotonia or weak muscle tone
Variable Symptoms
- Hypotonia
- Delayed motor skill development (e.g., walking or crawling)
- Delayed or difficult speech
- Not easily excitable (normally quiet and calm)
- Undescended testicles at birth
- Symptoms vary from patient to patient
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Description
This quiz covers the genetic aspects of XYY syndrome and Turner syndrome, including risk factors, complications, and associated health conditions.
