Cytogenetics — MCQs Biology

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1. Cytogenetics is the branch of biology that deals with the study of:





2. The term chromosome was coined by:





3. Chromosomes are best visible during:





4. The constricted region of a chromosome is called:





5. The ends of chromosomes are known as:





6. A chromosome with the centromere in the middle is called:





7. Chromosomes having centromere near one end are:





8. A chromosome without a centromere is known as:





9. The number of chromosomes in somatic human cells is:





10. Haploid chromosome number in humans is:





11. The complete set of chromosomes of an organism is called:





12. Diagrammatic representation of chromosomes arranged in order is called:





13. Chromosomal study using staining techniques is known as:





14. G-banding technique is mainly used to:





15. The nucleolar organizer region (NOR) is associated with:





16. Secondary constrictions are found at:





17. Polyploidy refers to the presence of:





18. Aneuploidy involves:





19. Down syndrome is caused by:





20. Turner syndrome individuals have chromosome complement:





21. Klinefelter syndrome is represented by:





22. Structural changes in chromosomes include:





23. Loss of a chromosome segment is called:





24. Reversal of chromosome segment is termed:





25. Exchange of segments between non-homologous chromosomes is called:





26. Chromosome duplication results in:





27. A chromosome with two centromeres is known as:





28. Holocentric chromosomes have:





29. Chromosomal aberrations can be detected using:





30. Barr body represents:





31. Number of Barr bodies equals:





32. Chromatin that stains lightly is called:





33. Highly condensed and inactive chromatin is known as:





34. Chromosome pairing occurs during:





35. Synapsis occurs during which stage?





36. Crossing over takes place during:





37. Visible evidence of crossing over is called:





38. A bivalent consists of:





39. Tetrad formation occurs due to:





40. Sex chromosomes in humans are:





41. Autosomes in humans are:





42. The smallest human chromosome is:





43. Polytene chromosomes are found in:





44. Lampbrush chromosomes are observed during:





45. Satellite chromosomes possess:





46. Kinetochore is associated with:





47. Chromosomal mutations are also called:





48. Numerical chromosome changes affect:





49. Euploid condition refers to:





50. Cytogenetic analysis is mainly useful for studying:





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