Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:### Educational Content: Understanding Karyotypes and Down Syndrome
**Introduction:**
A karyotype is a complete set of chromosomes in an individual, arranged and displayed in pairs. It is used for the study of chromosomal aberrations, cellular function, and to diagnose genetic conditions.
**Description of the Image:**
The image presents a karyotype, which belongs to a male with Down Syndrome. Down Syndrome, also known as Trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
**Detailed Analysis of the Karyotype:**
In the karyotype image:
- Chromosomes are paired and color-coded for visibility, revealing structural details.
- There are three copies of chromosome 21 (trisomy 21), which is the defining characteristic of Down Syndrome.
- The remaining chromosomes are present in pairs as expected.
- The last pair, comprising one X and one Y chromosome, confirms the male gender of the individual.
**Quiz Question:**
Based on the karyotype provided, test your understanding:
- **True**
- **False**
Ensure you carefully observe the chromosomes, especially the chromosomal pair 21, before answering.
---
This educational description aims to enhance understanding of chromosomal arrangements and their implications in genetic disorders like Down Syndrome. Students are encouraged to explore more on genetic karyotyping and the diagnosis of chromosomal abnormalities.
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