Chromosomal Conditions in Humans
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Questions and Answers

What could happen if the genetic diagnosis is not made or delayed?

  • The developing brain may lose the 'window of opportunity' for explicit support. (correct)
  • Individuals may function at an even higher level.
  • The physical characteristics may become more noticeable.
  • The cognitive deficits may disappear on their own.

    • Why is it important to focus on the neurocognitive underpinnings of behavior?

  • Behavioral problems may arise from different information processing deficits. (correct)
  • Behavioral problems are easier to resolve than cognitive deficits.
  • Cognitive deficits always lead to behavioral problems later in life.
  • Cognitive deficits have no impact on behavioral problems.

    • What technological advancement has improved the detection of genetic variations in unborn children?

  • X-ray imaging
  • Physical examination of the fetus
  • Screening maternal blood (correct)
  • Ultrasound technology

    • What does the text suggest about early screening for neurobehavioral problems in young children with SCT?

    <p>It can help identify targets for early, tailored support and intervention programs.</p> Signup and view all the answers

    What does the text imply about the development of neurocognitive mechanisms in early childhood?

    <p>Precursors of some mechanisms can already be measured in early childhood.</p> Signup and view all the answers

    Why is knowledge about the development of children with SCT important?

    <p>To provide appropriate support as early as possible when needed.</p> Signup and view all the answers

    What is the estimated prevalence of sex chromosome trisomies (SCT) in live births?

    <p>1 in 650 to 1 in 1000</p> Signup and view all the answers

    Why are individuals with SCT often underdiagnosed?

    <p>Symptoms are treated without knowledge of the underlying genetic condition</p> Signup and view all the answers

    What genetic variations can lead to Klinefelter syndrome and XYY syndrome?

    <p>Sex chromosome trisomies involving the X or Y chromosomes</p> Signup and view all the answers

    Why may up to 75% of individuals with SCT never be diagnosed?

    <p>Because symptoms are often treated without knowing the genetic condition</p> Signup and view all the answers

    What is the cause of chromosome trisomies like sex chromosome trisomies (SCT)?

    <p>Spontaneous error during early cell division</p> Signup and view all the answers

    What is one reason for the underdiagnosis of individuals with SCT?

    <p>Treatment of symptoms without knowledge of the genetic condition</p> Signup and view all the answers

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