MCQOPTIONS
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MCQOPTIONS
This section includes 39 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In which of the following cases, genotypic and phenotypic ratio will remain same in F2 generation |
| A. | Law of independent assortment |
| B. | Law of Segregation |
| C. | Test cross |
| D. | Incomplete dominance. |
| Answer» E. | |
| 2. |
A pure breeding tall pea plant was crossed to dwarf plant what will be the frequency of dwarf plants in F1 |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 0 |
| Answer» E. | |
| 3. |
In question number 2 what will be frequency of dwarf plant in F2 |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 0 |
| Answer» B. 0.5 | |
| 4. |
How many pairs of homologous chromosomes are present in Pisum sativum |
| A. | Five pairs |
| B. | Six pairs |
| C. | Seven pairs |
| D. | Eight pairs. |
| Answer» D. Eight pairs. | |
| 5. |
Which of the following characters of pea plant is dominant? |
| A. | Axial flowers |
| B. | Yellow pods |
| C. | White flowers |
| D. | Wrinkled seeds |
| Answer» B. Yellow pods | |
| 6. |
A pea plant with yellow seed was crossed to a plant having green seeds. What will happen in F1; if plants are true breeding |
| A. | All seeds will be yellow |
| B. | Half of seeds will be yellow |
| C. | All the seeds will be green |
| D. | Both will be present in ratio of 1:2:1 |
| Answer» B. Half of seeds will be yellow | |
| 7. |
A man with blood group A marries a woman of blood group B . Both are heterozygous. What is the off-springs having phenotype O |
| A. | Zero |
| B. | 25% |
| C. | 50% |
| D. | 75% |
| Answer» C. 50% | |
| 8. |
The trait Kernel colour in corn in controlled by how many pairs of genes |
| A. | One pair |
| B. | Two pairs |
| C. | Three pairs |
| D. | Many pairs. |
| Answer» D. Many pairs. | |
| 9. |
Baldness is most frequent in |
| A. | Men |
| B. | Women |
| C. | Children |
| D. | Girls. |
| Answer» B. Women | |
| 10. |
In nature, Garden pea is |
| A. | Self-fertilized |
| B. | Cross fertilized |
| C. | Cross pollinated |
| D. | None of these |
| Answer» B. Cross fertilized | |
| 11. |
The genes which do not follow law of independent assortment |
| A. | Crossed genes |
| B. | Linked genes |
| C. | Recessive genes |
| D. | Dominant genes |
| Answer» C. Recessive genes | |
| 12. |
Phenotype represents |
| A. | Morphology |
| B. | Physiology |
| C. | Genetics |
| D. | None of these |
| Answer» B. Physiology | |
| 13. |
During test cross, if all offsprings are phenotypically dominant then parents are |
| A. | Homozygous |
| B. | Heterozygous |
| C. | One homozygous other heterozygous |
| D. | None of these |
| Answer» B. Heterozygous | |
| 14. |
True breeding variety is produced by |
| A. | Self fertilization |
| B. | Cross fertilization |
| C. | Both of these |
| D. | None of these |
| Answer» B. Cross fertilization | |
| 15. |
Which of the following is universal donor? |
| A. | A |
| B. | B |
| C. | AB |
| D. | O |
| Answer» E. | |
| 16. |
Such inheritance in which traits vary quantitatively is |
| A. | Continuously varying trait |
| B. | Incomplete dominance |
| C. | Test cross |
| D. | Polygenic inheritance |
| Answer» E. | |
| 17. |
Skin colour in man is controlled by |
| A. | 1 pair |
| B. | 2 pairs |
| C. | 4 pairs |
| D. | 8 pairs |
| Answer» D. 8 pairs | |
| 18. |
Inheritance in man is traced by |
| A. | Mathematical method |
| B. | Genetic method |
| C. | Statistical method |
| D. | Pedigree method |
| Answer» E. | |
| 19. |
Feature correct to O-negative blood group |
| A. | A,B antigen present |
| B. | Anti-A, Anti-B antibody present |
| C. | Rh antigen present |
| D. | Rh antibody present |
| Answer» C. Rh antigen present | |
| 20. |
Which of the following blood group is always heterozygous? |
| A. | A |
| B. | B |
| C. | AB |
| D. | O |
| Answer» D. O | |
| 21. |
Interaction between genes occupying different loci is |
| A. | Dominance |
| B. | Epistasis |
| C. | Pleiotropy |
| D. | None of these |
| Answer» C. Pleiotropy | |
| 22. |
The position of a gene on chromosome is called |
| A. | Habitat |
| B. | Position |
| C. | Locus |
| D. | Location |
| Answer» D. Location | |
| 23. |
Filial is a Latin word. It means |
| A. | Spring |
| B. | Issue |
| C. | Progeny |
| D. | Descendent |
| Answer» D. Descendent | |
| 24. |
Which of the following condition is hybrid |
| A. | TT |
| B. | Tt |
| C. | Tt |
| D. | All of these |
| Answer» C. Tt | |
| 25. |
Which of the following is monohybrid cross |
| A. | TT x tt |
| B. | TTYy x Ttyy |
| C. | Both of these |
| D. | None of these |
| Answer» B. TTYy x Ttyy | |
| 26. |
A pure breeding tall plant was crossed to dwarf plant. What would be probability of Tt genotype in F2 |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 0 |
| Answer» C. 0.75 | |
| 27. |
A monohybrid cross yielded 3:1 in F2. What could be mode of inheritance? |
| A. | Segregation |
| B. | Independent assortment |
| C. | Both of these |
| D. | None of these |
| Answer» B. Independent assortment | |
| 28. |
If a heterozygous individual shows the complete effect of both alleles, the type of inheritance would be |
| A. | Complete dominance |
| B. | Non dominance |
| C. | Incomplete dominance |
| D. | Co-Dominance |
| Answer» E. | |
| 29. |
The gene which controls ABO group has how many alleles in an individual |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four. |
| Answer» D. Four. | |
| 30. |
How many genes control Rh blood group system? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» D. Four | |
| 31. |
Genes that affect growth rate in humans influencing both weight and height are |
| A. | Codominant |
| B. | Epistasis |
| C. | Pleiotropy |
| D. | Polygene |
| Answer» D. Polygene | |
| 32. |
All of the following are continuously varying traits except |
| A. | Kernel colour in wheat |
| B. | Skin colour in humans |
| C. | Height in humans |
| D. | Tongue rolling in humans |
| Answer» E. | |
| 33. |
The number of linkage groups in humans is |
| A. | 12 |
| B. | 23 |
| C. | 46 |
| D. | 92 |
| Answer» C. 46 | |
| 34. |
Recombination frequency between two linked genes can be calculated by |
| A. | Back cross |
| B. | Test cross |
| C. | Normal cross |
| D. | None of these |
| Answer» B. Test cross | |
| 35. |
Which of the following is male determining gene in humans? |
| A. | Tfm |
| B. | SRY |
| C. | Both of these |
| D. | None of these |
| Answer» C. Both of these | |
| 36. |
It was discovered by J.Seiler in 1914 in moth. |
| A. | XO-XX |
| B. | XY-XX |
| C. | ZZ-ZW |
| D. | None of these |
| Answer» D. None of these | |
| 37. |
Haemophilia B is due to abnormality of factor |
| A. | VIII |
| B. | IX |
| C. | X |
| D. | XI |
| Answer» C. X | |
| 38. |
Gene for blue opsin is present on chromosome. |
| A. | X |
| B. | Y |
| C. | 7 |
| D. | 11 |
| Answer» D. 11 | |
| 39. |
Most common type of Diabetes mellitus is |
| A. | Type I |
| B. | Type II |
| C. | MODY |
| D. | None of these |
| Answer» C. MODY | |