MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is not an example of quantitative trait? |
| A. | Cob length in maize |
| B. | Height in humans |
| C. | Human intelligence |
| D. | Blood groups in humans |
| Answer» E. | |
| 2. |
Which of the following conclusions can be made by studying a histogram? |
| A. | Extreme phenotypes are common |
| B. | Intermediate phenotypes are more frequent |
| C. | Intermediate phenotypes are rare |
| D. | All phenotypes are present in equal amounts |
| Answer» C. Intermediate phenotypes are rare | |
| 3. |
Which of the following curves can be a representation of the skin colour in a population? |
| A. | Sigmoid curve |
| B. | An ellipse |
| C. | Histogram |
| D. | J-shaped curve |
| Answer» D. J-shaped curve | |
| 4. |
Davenport showed that six pairs of genes are involved in controlling the skin colour in humans. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
On which of the following factors, the amount of melanin produced depends? |
| A. | Number of recessive alleles |
| B. | Number of chromosomes present in an individual |
| C. | Number of dominant genes |
| D. | Number of loci present in DNA |
| Answer» D. Number of loci present in DNA | |
| 6. |
On how many loci the genes responsible for skin colour are present? |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | Five |
| Answer» C. Four | |
| 7. |
On which of the following factor, the degree of redness of progenies depend? |
| A. | Number of dominant alleles |
| B. | Number of recessive alleles |
| C. | Number of contrasting traits |
| D. | Number of phenotypic characters |
| Answer» B. Number of recessive alleles | |
| 8. |
Which of the following is not a phenotypic class of the F2 generation in wheat? |
| A. | Extreme red |
| B. | Deep red |
| C. | Black |
| D. | White |
| Answer» D. White | |
| 9. |
What was the ratio of F2 generation when red and white kernelled variety of wheat were crossed? |
| A. | 1: 2: 1 |
| B. | 9: 3: 3: 1 |
| C. | 1: 4: 6: 4: 1 |
| D. | 3: 1 |
| Answer» D. 3: 1 | |
| 10. |
Which two varieties of wheat were crossed by H. Nilsson to study the kernel colour in wheat? |
| A. | Red and black kernelled variety |
| B. | Red and white kernelled variety |
| C. | White and black kernelled variety |
| D. | Black and blue kernelled variety |
| Answer» C. White and black kernelled variety | |
| 11. |
Which of the following scientists demonstrated the quantitative traits in wheat? |
| A. | Ernst Haeckel |
| B. | H. Nilsson-Ehle |
| C. | West |
| D. | Paul Vincent |
| Answer» C. West | |
| 12. |
What are polygenes? |
| A. | Genes involved in quantitative inheritance |
| B. | Genes involved in the qualitative inheritance |
| C. | Genes involved in multiple allelism |
| D. | Multiple genes for a single trait |
| Answer» B. Genes involved in the qualitative inheritance | |
| 13. |
In humans, only tall and short people exist. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
Which of the following is a classic example of polygenic inheritance? |
| A. | Skin colour in humans |
| B. | Blood groups |
| C. | Flower colour in peas |
| D. | Stem height in peas |
| Answer» B. Blood groups | |
| 15. |
What are polygenic traits? |
| A. | Traits controlled by a single gene |
| B. | Traits not controlled by any genes |
| C. | Traits controlled by two genes |
| D. | Traits controlled by three or more genes |
| Answer» E. | |
| 16. |
What kinds of traits were described by Mendel? |
| A. | Contrasting traits |
| B. | Alternative forms |
| C. | Mixed forms |
| D. | Opposite and recessive forms |
| Answer» B. Alternative forms | |