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Trisomy 21 (Down Syndrome) (female) karyotype | |||
Down syndrome or trisomy 21 is caused by nondisjunction of chromosome 21 in a parent who is chromosomally normal and is one of the most common chromosomal abnormalities in liveborn children. The frequency of trisomy 21 in the population is approximately 1 in 650 to 1,000 live births, in Australia between 1991-97 there were 2,358 Trisomy 21 (Down) infants. | Down syndrome or trisomy 21 is caused by nondisjunction of chromosome 21 in a parent who is chromosomally normal and is one of the most common chromosomal abnormalities in liveborn children. The frequency of trisomy 21 in the population is approximately 1 in 650 to 1,000 live births, in Australia between 1991-97 there were 2,358 Trisomy 21 (Down) infants. | ||
Image Source: UNSW Embryology | The normal human karyotypes contain 22 pairs of autosomal chromosomes and one pair of sex chromosomes. The karyotype is the characteristic chromosome complement as identified by staining and can only be identified during cell division when chromosomes are folded. The chromosomes when organised as an image in sequence are called a karyogram or idiogram. | ||
http://embryology.med.unsw.edu.au/Defect/page21.htm | |||
'''Image Source:''' UNSW Embryology http://embryology.med.unsw.edu.au/Defect/page21.htm | |||
[[Category:Abnormal Development]] [[Category:Genetic Abnormalities]] [[Category:Human Embryo]] [[Category:Human Fetus]] |
Revision as of 13:20, 5 August 2009
Trisomy 21 (Down Syndrome) (female) karyotype
Down syndrome or trisomy 21 is caused by nondisjunction of chromosome 21 in a parent who is chromosomally normal and is one of the most common chromosomal abnormalities in liveborn children. The frequency of trisomy 21 in the population is approximately 1 in 650 to 1,000 live births, in Australia between 1991-97 there were 2,358 Trisomy 21 (Down) infants.
The normal human karyotypes contain 22 pairs of autosomal chromosomes and one pair of sex chromosomes. The karyotype is the characteristic chromosome complement as identified by staining and can only be identified during cell division when chromosomes are folded. The chromosomes when organised as an image in sequence are called a karyogram or idiogram.
Image Source: UNSW Embryology http://embryology.med.unsw.edu.au/Defect/page21.htm
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Yi efo/eka'e gwa ebo wo le nyangagi wuncin ye kamina wunga tinya nan
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current | 16:19, 27 July 2009 | 480 × 284 (12 KB) | MarkHill (talk | contribs) | Down syndrome or trisomy 21 is caused by nondisjunction of chromosome 21 in a parent who is chromosomally normal and is one of the most common chromosomal abnormalities in liveborn children. The frequency of trisomy 21 in the population is approximately 1 |
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- 2009 Lecture 2
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- 2010 Group Project 3
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- 2011 Lab 1 - Gametogenesis
- ANAT2341 Fertilization Quiz
- ANAT2341 Lab 1 - Gametogenesis
- ANAT2341 Lab 1 - Quiz
- Abnormal Development - Genetic
- BGDA Practical 3 - Gametogenesis
- BGD Practical - Fertilization to Implantation Quiz
- Cell Division - Meiosis
- Foundations Quiz
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- Histology Stains
- Human Abnormal Development
- In Vitro Oogenesis
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- Lecture - Fertilization
- Molecular Development - Genetics
- Oocyte Development
- Trisomy 21
- Week 1 and 2 Quiz
- Talk:BGDA Practical 3 - Oogenesis and Ovulation
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