✓ Board-verified
Biology · 2026 · 3 marks
CBSE 2026 · Region 1 · Set 1 · Q23
(a) What is pedigree analysis? Mention its importance in human genetics. (2 pts.) (b) Analyse the following pedigree and write the (i) Pattern of…
(a)
What is pedigree analysis ? Mention its importance in human genetics. ($\displaystyle 2$ pts.)
(b)
Analyse the following pedigree and write the
(i)
Pattern of inheritance.
(ii)
Give one example of disease showing such an inheritance pattern.
Marking-scheme solution
(a)
Pedigree analysis –It is analysis of traits or inheritance of traits in several generations of a family.
Importance : To trace the inheritance of a trait , abnormality or a disease.
(b)(i)
Autosomal- Recessive
(ii)
Sickle Cell Anaemia / Thalassemia / Phenylketonuria /Any other correct example.
All Principles of Inheritance and Variation questions2026 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 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.