The image shows a karyotype. Based on the chromosome count, what condition is shown?

Question

The image shows a karyotype. Based on the chromosome count, what condition is shown?
<!-- AI image prompt | slot:karyotype_trisomy_21_v3 | paste into Gemini/DALL-E/Midjourney: STRICT RULES — OBEY EVERY ONE OR THE IMAGE IS UNUSABLE:
(1) The image contains EXACTLY these text labels and nothing else: "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "X", "Y". (2) The following words MUST NOT APPEAR anywhere on the image: trisomy, Down, syndrome, disorder, abnormality, extra, 21, chromosomal, genetic, condition, diagnosis. (3) ZERO arrows other than those explicitly described. ZERO icons or illustrations not explicitly described. ZERO highlighting/glow on any single element. (4) ZERO title, heading, caption, watermark, color legend, key, scale bar, page number. (5) Background: pure flat white (#FFFFFF). (6) ALL labels (when present) use identical typography.

SUBJECT: Black-and-white scientific karyotype of a single human cell, 1400x1100, white background. STRUCTURE: chromosomes arranged in pairs by size, ordered 1 through 22 plus X and Y. Pairs 1-22 each contain exactly TWO chromosomes EXCEPT pair 21 which contains exactly THREE chromosomes. Each chromosome drawn with realistic G-banding pattern (alternating dark and light bands). Below each cluster, a small black label with just the pair number. The X and Y are at the bottom-right labeled "X" and "Y". Layout: 4-5 rows of pairs grouped roughly by size. FINAL REMINDER: NO words "trisomy", "Down syndrome", or any diagnosis label anywhere. NO highlight on pair 21 (no red circle, no color emphasis). Student must COUNT the chromosomes at pair 21 to identify the abnormality and apply prior knowledge. -->

Accepted Answer

Down syndrome

Answer

Turner syndrome

Answer

Normal karyotype

Answer

Klinefelter syndrome

The image shows a karyotype. Based on the chromosome count, what condition is shown?

Explanation

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