Q1. In Mendelian inheritance, what is the expected genotypic ratio of the F2 generation in a monohybrid cross?A. 3:1B. 9:3:3:1C. 1:2:1D. 2:1
Q2. Which of the following correctly describes polygenic inheritance?A. One gene controls multiple traits.B. Multiple genes influence a single trait.C. A single gene determines a single phenotype.D. Traits are inherited only from one parent.
Q3. Which scientist discovered the concept of sex-linked inheritance through experiments on fruit flies?A. Gregor MendelB. Thomas Hunt MorganC. Sutton and BoveriD. Watson and Crick
Q4. What is the primary genetic cause of hemophilia?A. Trisomy of chromosome 21B. A mutation in the X chromosomeC. Deletion of chromosome 5D. A mutation in the Y chromosome
Q5. Which scientist proposed the Chromosomal Theory of Inheritance?A. Gregor MendelB. Thomas Hunt MorganC. Sutton and BoveriD. Watson and Crick
Q6. Which genetic concept explains why males are more likely to express X-linked recessive traits?A. Dosage compensationB. HemizygosityC. Polygenic inheritanceD. Epistasis
Q7. What is the expected genotypic ratio of a monohybrid cross in the F2 generation?A. 3:1B. 9:3:3:1C. 1:2:1D. 2:1
Q8. Which of the following is a correct statement about pleiotropy?A. A single gene affects multiple traits.B. Multiple genes control a single phenotype.C. Pleiotropy follows Mendel’s Law of Independent Assortment.D. It occurs only in plants.
Q9. What is the role of crossing over during meiosis?A. Prevents genetic variationB. Increases genetic diversityC. Ensures mitosis occurs properlyD. Maintains identical copies of genes
Q10. Which of the following statements about dominant and recessive traits is incorrect?A. A dominant allele expresses its trait in both homozygous and heterozygous conditions.B. A recessive allele expresses its trait only in the homozygous condition.C. Dominant traits are always more common in a population than recessive traits.D. Recessive traits can be passed on through generations without being expressed.