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Zoology - Principles of Inheritance and Variation - Two Marks Study Materials

12th Standard EM

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Biology

Time : 00:45:00 Hrs
Total Marks : 30
    15 x 2 = 30
  1. What is haplodiploidy?

  2. Distinguish between heterogametic and homogametic sex determination systems

  3. What is Lyonisation?

  4. What is criss-cross inheritance?

  5. Why are sex linked recessive characters more common in the male human beings?

  6. What are holandric genes?

  7. Mention the symptoms of Phenylketonuria

  8. What is a syndrome?

  9. Define multiple allelism.

  10. State the allelic forms of I gene and mention its chromosomal location.

  11. Mention few X-linked inherited diseases

  12. Name any four Mendelian disorders

  13. What is the phenotype of (a) IAlO (b) 1O1O

  14. Write a note on Huntington's chorea.

  15. List out any four clinical symptoms of Klinefelter's syndrome.

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