This image displays a human karyotype, which is an organized profile of a person's chromosomes. To understand what this specific karyotype represents, we can look at two main features: the total number of chromosomes and the sex chromosomes.
Step 1: Count the Autosomes
The first 22 pairs of chromosomes are called autosomes. They are numbered from 1 to 22 based on their size, with chromosome 1 being the largest and chromosome 22 being the smallest. In this image, we can see pairs for every number from 1 to 22. This indicates that there are 44 autosomes (22 pairs).
Step 2: Identify the Sex Chromosomes
The last pair of chromosomes determines the biological sex of the individual. These are labeled X and Y in the bottom right corner of the chart.
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Females typically have two X chromosomes (XX).
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Males typically have one X and one Y chromosome (XY).
Looking at the image, we see one chromosome labeled
X and one smaller chromosome labeled
Y. The presence of the Y chromosome indicates that this is a male karyotype.
Step 3: Check for Abnormalities
We also need to check if there are any extra or missing chromosomes.
* Each numbered group (1–22) has exactly two chromosomes.
* The sex chromosome group has exactly two chromosomes (one X and one Y).
* There are no signs of conditions like Down syndrome (which would show three copies of chromosome 21) or Turner syndrome (which would show only one X).
Conclusion
Since there are 22 pairs of autosomes and one pair of XY sex chromosomes, the total chromosome count is 46. This represents a normal genetic makeup for a human male.
Final Answer:
Normal Male (46, XY)
Parent Tip: Review the logic above to help your child master the concept of karyotype activity worksheet.
