Let’s look at the image carefully. It shows a set of chromosomes arranged in pairs, numbered from 1 to 22, plus one more pair at the bottom right that looks different — it’s labeled with an “X” and a “Y”.
In humans, normal cells have 46 chromosomes: 23 pairs. The first 22 pairs are called autosomes (same in males and females). The 23rd pair is the sex chromosomes — they determine if someone is male or female.
- If the 23rd pair is
XX, the person is female.
- If the 23rd pair is
XY, the person is male.
Looking at the last pair in this image: one chromosome is large (like an X), and the other is small (like a Y). That means this is an
XY pair.
So, this karyotype belongs to a
male.
Also, we should check if there are any extra or missing chromosomes. All pairs from 1 to 22 have two chromosomes each. Pair 21 has two chromosomes (not three, so no Down syndrome). Pair 23 is XY — normal for a male.
No abnormalities detected. This is a normal male karyotype.
Final Answer: Male
Parent Tip: Review the logic above to help your child master the concept of answers worksheet 6 karyotype.
