Podcast
Questions and Answers
What is the total number of chromosomes in most humans?
What is the total number of chromosomes in most humans?
- 48
- 46 (correct)
- 44
- 42
Which genetic disorder is specifically caused by having three copies of chromosome 21?
Which genetic disorder is specifically caused by having three copies of chromosome 21?
- Cystic fibrosis
- Turner syndrome
- Klinefelter syndrome
- Down syndrome (correct)
What symptom is commonly associated with Down syndrome?
What symptom is commonly associated with Down syndrome?
- Increased height for age
- Enhanced vision
- Flattened facial features (correct)
- Prolonged lifespan
What type of genetic issue can lead to an extra chromosome?
What type of genetic issue can lead to an extra chromosome?
Which of the following is NOT a characteristic of Down syndrome?
Which of the following is NOT a characteristic of Down syndrome?
Flashcards
Down syndrome
Down syndrome
A genetic disorder where a person has three copies of chromosome 21, causing symptoms like delayed development and certain physical features.
Chromosome 21
Chromosome 21
One of the 23 pairs of chromosomes in humans.
Chromosome pairs in humans
Chromosome pairs in humans
Humans typically have 23 pairs of chromosomes, totaling 46.
Genetic disorder
Genetic disorder
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Cell division errors
Cell division errors
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Study Notes
Genetic Disorders Due to Chromosome Abnormalities
- Genetic disorders can arise from missing or extra chromosomes.
- Normal humans possess 23 pairs (46 total) of chromosomes.
- Errors during cell division (sperm, egg, or embryo) can lead to extra copies of chromosomes.
- Down syndrome results from an extra copy of chromosome 21.
- Down syndrome involves a range of symptoms.
- Symptoms of Down syndrome include: flattened facial features, upward-slanting eyes, and short stature for age.
- Down syndrome often includes delayed mental and social development.
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Description
This quiz explores genetic disorders stemming from chromosome abnormalities, specifically focusing on Down syndrome. Learn about the characteristics of individuals with Down syndrome, including physical features and developmental challenges. Delve into how extra or missing chromosomes can affect human genetics.
