MHT CET 202623 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 23 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Principles of Inheritance and Variation
MHT CET 2026 · 23 April · Evening Shift · Biology · Principles of Inheritance and Variation
Study the following statements and select the correct option:...
Study the following statements and select the correct option:
Statement (I): Examples of Mendelian disorders are Turner's syndrome and Down's syndrome.
Statement (II): Mendelian disorders are caused due to alternation or mutation in the gene.
Statement (III): Chromosomal disorders are caused due to the absence or excess of one or more chromosomes
Statement (I): Examples of Mendelian disorders are Turner's syndrome and Down's syndrome.
Statement (II): Mendelian disorders are caused due to alternation or mutation in the gene.
Statement (III): Chromosomal disorders are caused due to the absence or excess of one or more chromosomes
Options
- AStatement II is correct and I and III are incorrect
- BStatement I, II and III are correct
- CStatement I is incorrect and II, III are correct
- DStatement I, II and III are incorrect
Correct answer
C. Statement I is incorrect and II, III are correct
Step-by-step solution
Statement I is incorrect because Turner's syndrome and Down's syndrome are examples of chromosomal disorders, not Mendelian disorders. Examples of Mendelian disorders include haemophilia, cystic fibrosis, sickle-cell anaemia, etc.
Statement II is correct as Mendelian disorders are mainly determined by alteration or mutation in a single gene.
Statement III is correct as chromosomal disorders are caused due to the absence or excess or abnormal arrangement of one or more chromosomes.
Therefore, Statement I is incorrect and Statements II and III are correct.
Answer: Statement I is incorrect and II, III are correct
Statement II is correct as Mendelian disorders are mainly determined by alteration or mutation in a single gene.
Statement III is correct as chromosomal disorders are caused due to the absence or excess or abnormal arrangement of one or more chromosomes.
Therefore, Statement I is incorrect and Statements II and III are correct.
Answer: Statement I is incorrect and II, III are correct