Q1. Which mode of inheritance is observed in Thalassemia?A. Autosomal dominantB. Autosomal recessiveC. X-linked recessiveD. Y-linked
Q2. Which of the following best describes codominance?A. One allele is dominant over the otherB. Both alleles contribute equally to the phenotypeC. The heterozygote shows an intermediate phenotypeD. A single gene affects multiple traits
Q3. Which of the following statements about codominance is incorrect?A. Both alleles are fully expressed in the heterozygous state.B. Blood group AB is an example of codominance.C. One allele completely dominates the other in codominance.D. Codominance differs from incomplete dominance.
Q4. What is the expected phenotypic ratio of a dihybrid cross in F2 generation if genes show complete dominance?A. 3:1B. 9:3:3:1C. 1:2:1D. 2:1
Q5. Which of the following is a correct statement about independent assortment?A. It applies to genes located on the same chromosome.B. It states that allele pairs separate independently during gamete formation.C. It occurs only in linked genes.D. It was not part of Mendel’s original findings.
Q6. Which of the following statements about mutations is correct?A. All mutations lead to harmful effects.B. Point mutations involve a single nucleotide change.C. Frameshift mutations occur only due to substitutions.D. Mutations do not contribute to evolution.
Q7. Which of the following is an example of multiple allelism?A. Human skin colorB. ABO blood group systemC. Sickle-cell anemiaD. Color blindness
Q8. Which scientist is credited with discovering the X-chromosome?A. Thomas Hunt MorganB. Walter SuttonC. Gregor MendelD. Henking
Q9. Which of the following statements about genetic mutations is incorrect?A. Mutations can be spontaneous or induced by external factors.B. Point mutations always result in frameshift mutations.C. Missense mutations change a single amino acid in a protein.D. Nonsense mutations introduce a premature stop codon.
Q10. Which type of mutation results in the addition or deletion of a nucleotide, shifting the reading frame?A. Point mutationB. Frameshift mutationC. Silent mutationD. Missense mutation