In genetics, what genetic condition results from trisomy of chromosome 21 in humans?
Answer and explanation
Correct answer: D. Down syndrome
- Step 1: Trisomy 21 (47, XX,+21 or 47, XY,+21) caused by nondisjunction during meiosis leads to Down syndrome. Answer: Down syndrome. Why not the others: Turner syndrome is monosomy X (45, X); Klinefelter is 47, XXY.
Practise more Molecular Biology, Genetics, and Human Physiology.
Free questions with an explanation for every one, and full timed Matura Shtetërore (Albania) mock tests.
More Molecular Biology, Genetics, and Human Physiology questions
- In cell biology, which organelle is responsible for generating the majority of cellular adenosine triphosphate (ATP) via aerobic cellular re…
- In cell biology, what is the primary structural component of the biological cell membrane described by the fluid mosaic model?
- In cell biology, where does the process of glycolysis occur within a eukaryotic cell?
- In cell biology, which cellular organelle contains hydrolytic acid enzymes designed to degrade worn-out cell parts and engulfed pathogens?
- In cell biology, what is the net yield of ATP molecules produced per molecule of glucose solely through the glycolysis stage?
- In cell biology, during which phase of the cell cycle does DNA replication (synthesis) occur?