NEET Biology: Principles of Inheritance and Variation — MCQ Test 8

Q6. Which of the following correctly describes pleiotropy?

Q7. Which of the following explains why some traits disappear in the F1 generation but reappear in the F2 generation?

Q8. Which of the following statements about genetic variation is correct?

Q9. What is the primary cause of Down’s syndrome?

Q10. Which of the following genetic disorders follows a Y-linked inheritance pattern?

NEET BiologyPrinciples of Inheritance and Variation

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Which type of sex determination system is seen in birds?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Biology preparation, focusing specifically on the chapter Principles of Inheritance and Variation. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Determination, Function, Chromosome, Following, Conditions, and Monosomy.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. Which type of sex determination system is seen in birds?

  • A. XY system
  • B. XO system
  • C. ZW system
  • D. Haplodiploidy

Q2. What is the function of a Barr body in female cells?

  • A. Activates all X chromosomes
  • B. Prevents expression of autosomal genes
  • C. Inactivates one X chromosome
  • D. Determines the sex of the individual

Q3. What is the role of the Y-chromosome in human sex determination?

  • A. It determines female characteristics
  • B. It triggers male development
  • C. It carries genes for blood type
  • D. It is inherited only from the mother

Q4. Which of the following conditions results from monosomy of the X chromosome?

  • A. Klinefelter’s syndrome
  • B. Turner’s syndrome
  • C. Down’s syndrome
  • D. Edward’s syndrome

Q5. Which of the following is an incorrect statement about co-dominance?

  • A. Both alleles are expressed in the heterozygous state.
  • B. AB blood group is an example of co-dominance.
  • C. One allele completely suppresses the other in co-dominance.
  • D. Co-dominance differs from incomplete dominance.

+ 5 more questions in the actual test

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