Genetics — MCQs Biology

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1. Genetics is the study of:





2. Who is known as the father of genetics?





3. Mendel performed his experiments on:





4. The term gene was introduced by:





5. The observable traits of an organism are called:





6. The genetic makeup of an organism is known as:





7. Alternative forms of a gene are called:





8. Mendel’s law of segregation states that:





9. Mendel’s law of independent assortment applies to genes located on:





10. The phenotypic ratio of a monohybrid cross is:





11. A dihybrid cross gives a phenotypic ratio of:





12. A homozygous genotype has:





13. Which genotype is heterozygous?





14. A test cross is carried out between:





15. The unit of inheritance is called:





16. Crossing over occurs during:





17. The chromosomal theory of inheritance was proposed by:





18. The position of a gene on a chromosome is called:





19. Sex-linked traits are located on:





20. Color blindness is an example of:





21. The genetic material in most organisms is:





22. A sudden heritable change is called:





23. Which scientist discovered linkage?





24. Genes located close together on the same chromosome show:





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





26. Trisomy 21 causes:





27. Which inheritance shows blending of traits?





28. ABO blood groups are an example of:





29. Multiple genes controlling a single trait is known as:





30. One gene affecting multiple traits is called:





31. Which phase shows maximum chromosome condensation?





32. The pairing of homologous chromosomes is called:





33. Which structure holds sister chromatids together?





34. Which chromosome determines male sex in humans?





35. Turner syndrome individuals have:





36. Klinefelter syndrome has genotype:





37. The exchange of genetic material occurs between:





38. Which inheritance is controlled by many genes?





39. A cross involving two traits is called:





40. The complete set of chromosomes is called:





41. Which molecule carries genetic information?





42. RNA differs from DNA by having:





43. Which base pairing occurs in DNA?





44. The process of copying DNA is called:





45. Messenger RNA carries information from:





46. Which scientist proposed the double helix model of DNA?





47. A change in chromosome number is called:





48. Which type of RNA forms ribosomes?





49. Which inheritance pattern is seen in sickle cell anemia?





50. The physical carrier of genes is:





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