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| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 1521 | How many genotypes are possible for the human ABO blood group gene with alleles Iᴬ, Iᴮ and i? | Biology/Biological Studies/Biotechnology/Biochemistry Deviations from Mendelism |
Easy |
| 1522 | Parents with blood groups A (Iᴬi) and B (Iᴮi) have a child. Which blood groups are possible? | Biology/Biological Studies/Biotechnology/Biochemistry Deviations from Mendelism |
Medium |
| 1523 | Human skin colour shows a continuous range of shades. This is best explained by | Biology/Biological Studies/Biotechnology/Biochemistry Deviations from Mendelism |
Medium |
| 1524 | In snapdragon, what proportion of F₂ plants from a pink × pink cross will breed true? | Biology/Biological Studies/Biotechnology/Biochemistry Deviations from Mendelism |
Hard |
| 1525 | Who provided experimental verification of the chromosomal theory of inheritance using Drosophila? | Biology/Biological Studies/Biotechnology/Biochemistry Chromosomal theory and linkage |
Easy |
| 1526 | Physical association of two or more genes on the same chromosome is called | Biology/Biological Studies/Biotechnology/Biochemistry Chromosomal theory and linkage |
Easy |
| 1527 | Why is Drosophila a good organism for genetic studies? | Biology/Biological Studies/Biotechnology/Biochemistry Chromosomal theory and linkage |
Medium |
| 1528 | Two genes show a recombination frequency of 1.3% while another pair shows 37.2%. What does this indicate? | Biology/Biological Studies/Biotechnology/Biochemistry Chromosomal theory and linkage |
Medium |
| 1529 | In a test cross of a double heterozygote AaBb (A and B on the same chromosome) with aabb, 900 offspring are p… | Biology/Biological Studies/Biotechnology/Biochemistry Chromosomal theory and linkage |
Hard |
| 1530 | In birds, the sex chromosome constitution of the female is | Biology/Biological Studies/Biotechnology/Biochemistry Sex determination |
Easy |
| 1531 | In grasshoppers, the male has the sex chromosome constitution | Biology/Biological Studies/Biotechnology/Biochemistry Sex determination |
Easy |
| 1532 | A male honey bee (drone) has how many chromosomes, and how does it form sperm? | Biology/Biological Studies/Biotechnology/Biochemistry Sex determination |
Medium |
| 1533 | What is the probability that a human couple's third child will be a boy if their first two children are girls? | Biology/Biological Studies/Biotechnology/Biochemistry Sex determination |
Medium |
| 1534 | In which organism does the female determine the sex of the offspring? | Biology/Biological Studies/Biotechnology/Biochemistry Sex determination |
Hard |
| 1535 | Sickle-cell anaemia results from the substitution of which amino acid at the sixth position of the β-globin c… | Biology/Biological Studies/Biotechnology/Biochemistry Mutation and genetic disorders |
Easy |
| 1536 | The karyotype of a person with Turner's syndrome is | Biology/Biological Studies/Biotechnology/Biochemistry Mutation and genetic disorders |
Easy |
| 1537 | A woman with normal vision whose father was colour blind marries a man with normal vision. What percentage of… | Biology/Biological Studies/Biotechnology/Biochemistry Mutation and genetic disorders |
Medium |
| 1538 | Why is thalassaemia described as a quantitative problem while sickle-cell anaemia is a qualitative problem? | Biology/Biological Studies/Biotechnology/Biochemistry Mutation and genetic disorders |
Medium |
| 1539 | In a pedigree, two unaffected parents have an affected daughter. What is the most likely mode of inheritance? | Biology/Biological Studies/Biotechnology/Biochemistry Mutation and genetic disorders |
Hard |
| 1540 | Which scientists proved that DNA is the genetic material using radioactively labelled bacteriophages? | Biology/Biological Studies/Biotechnology/Biochemistry Search for the genetic material |
Easy |