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In the past, the IOC has employed two genetic sex- determination tests. The Barr body test screens for the presence of two X chromosomes. In XX somatic cells, one copy of the X chromosome condenses into a largely inactive structure called a Barr body, which can be seen using a light microscope. In more recent years, a polymerase chain reaction-based screen has been used to amplify the DNA sequence of the SRY gene, which is found only on the Y chromosome. Based on their karyotypes, what would be the outcome of these two tests for each of the four individuals? Drag the labels to indicate the presence or absence of a Barr body and the SRY gene sequence.

In the past, the IOC has employed two genetic sex- determination tests. The Barr body test screens for the presence of two X chromosomes. In XX somatic cells, one copy of the X chromosome condenses into a largely inactive structure called a Barr body, which can be seen using a light microscope. In more recent years, a polymerase chain reaction-based screen has been used to amplify the DNA sequence of the SRY gene, which is found only on the Y chromosome. Based on their karyotypes, what would be the outcome of these two tests for each of the four individuals? Drag the labels to indicate the presence or absence of a Barr body and the SRY gene sequence.

Human Anatomy & Physiology (11th Edition)
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
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In the past, the IOC has employed two genetic sex- determination tests. The Barr body test screens for the presence of two X chromosomes. In XX somatic cells, one copy of the X chromosome condenses into a largely inactive structure called a Barr body, which can be seen using a light microscope. In more recent years, a polymerase chain reaction-based screen has been used to amplify the DNA sequence of the SRY gene, which is found only on the Y chromosome. Based on their karyotypes, what would be the outcome of these two tests for each of the four individuals? Drag the labels to indicate the presence or absence of a Barr body and the SRY gene sequence.
The image is a table comparing the presence of Barr body and SRY sequence among normal females and males, as well as two athletes. Here's the transcription: | | Barr body? | SRY sequence? | |-------------------------------|------------|---------------| | Normal female (control) | [ ] | [ ] | | Normal male (control) | [ ] | [ ] | | Athlete 1 | [ ] | [ ] | | Athlete 2 | [ ] | [ ] | On the left, there are two labels in boxes: - absent - present The boxes for Barr body and SRY sequence are meant to be filled with either "present" or "absent" based on the findings from tests. - **Barr body** is typically seen in females as it represents inactivated X chromosomes. - **SRY sequence** is usually present in males, indicating the presence of the SRY gene responsible for male sex determination. This table is likely used to analyze the chromosomal characteristics of the athletes in comparison to standard male and female controls.
Transcribed Image Text:The image is a table comparing the presence of Barr body and SRY sequence among normal females and males, as well as two athletes. Here's the transcription: | | Barr body? | SRY sequence? | |-------------------------------|------------|---------------| | Normal female (control) | [ ] | [ ] | | Normal male (control) | [ ] | [ ] | | Athlete 1 | [ ] | [ ] | | Athlete 2 | [ ] | [ ] | On the left, there are two labels in boxes: - absent - present The boxes for Barr body and SRY sequence are meant to be filled with either "present" or "absent" based on the findings from tests. - **Barr body** is typically seen in females as it represents inactivated X chromosomes. - **SRY sequence** is usually present in males, indicating the presence of the SRY gene responsible for male sex determination. This table is likely used to analyze the chromosomal characteristics of the athletes in comparison to standard male and female controls.
The image displays a karyotype analysis comparing chromosome patterns among a control male, control female, and two athletes. A karyotype is a visual representation of chromosomes, organized by size and number. **Control Female:** - Contains 22 pairs of autosomes numbered 1 to 22. - The sex chromosomes are XX. **Control Male:** - Contains 22 pairs of autosomes, similar to the female. - The sex chromosomes are XY. **Athlete 1:** - Displays the same 22 pairs of autosomes. - The sex chromosomes are XY. **Athlete 2:** - Contains the typical 22 pairs of autosomes. - The sex chromosomes are XXY, indicating the presence of an extra X chromosome. The karyotype analysis helps in determining genetic differences, especially concerning sex chromosomes, among the individuals studied. Athlete 2's karyotype indicates a condition known as Klinefelter syndrome due to the extra X chromosome.
Transcribed Image Text:The image displays a karyotype analysis comparing chromosome patterns among a control male, control female, and two athletes. A karyotype is a visual representation of chromosomes, organized by size and number. **Control Female:** - Contains 22 pairs of autosomes numbered 1 to 22. - The sex chromosomes are XX. **Control Male:** - Contains 22 pairs of autosomes, similar to the female. - The sex chromosomes are XY. **Athlete 1:** - Displays the same 22 pairs of autosomes. - The sex chromosomes are XY. **Athlete 2:** - Contains the typical 22 pairs of autosomes. - The sex chromosomes are XXY, indicating the presence of an extra X chromosome. The karyotype analysis helps in determining genetic differences, especially concerning sex chromosomes, among the individuals studied. Athlete 2's karyotype indicates a condition known as Klinefelter syndrome due to the extra X chromosome.
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