✓ Board-verified
Biology · 2025 · 1 mark
CBSE 2025 · Region 5 · Set 2 · Q9
Match the terms in Column-I with their description in Column-II and choose the correct option.
Match the terms in Column-I with their description in Column-II and choose the correct option.
| Column-I (Terms) | Column-II (Descriptions) |
| a. Dominance | (i) Many genes govern a single character. |
| b. Codominance | (ii) In a heterozygote organism, only one allele expresses itself. |
| c. Pleiotropy | (iii) In a heterozygous organism, both alleles express themselves fully. |
| d. Polygenic inheritance | (iv) A single gene influences many characters. |
Official answer
(A)
a-(ii), b-(iii), c-(iv), d-(i)
All Principles of Inheritance and Variation questions2025 question paperNCERT solutions: Principles of Inheritance and VariationPractice Principles of Inheritance and Variation →
More from Principles of Inheritance and Variation
- In which of the given chromosomal disorders does the individual have tall stature with feminised character?2024
- In the following figure, two ways of pairing of two homologous pairs of chromosomes are shown. Which of the following phenomena is expressed?2026
- Study the pedigree chart of a family given below and answer the questions that follow: Is the disease in this pedigree chart a recessive or dominant…2023
- Study the figures given below and answer the questions. Cross - A Cross - B Identify in which of the crosses the strength of linkage between the…2026
- Inheritance of which of the following traits is shown in the cross given below? Choose the correct option from the following:2025
- If both the parents are carriers for thalassaemia, the chances of an afflicted child to be born to them is:2024
- Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?2025
- Which of the following features correctly show the mechanism of sex- determination in honey-bees? (i) A zygote formed from the union of a sperm and…2025
CBSE Class 12 Biology past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.