Heredity Book Back Questions

10th Standard EM

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Science

Time : 00:45:00 Hrs
Total Marks : 30
    3 x 1 = 3
  1. According to Mendel alleles have the following character

    (a)

    Pair of genes

    (b)

    Responsible for character

    (c)

    Production of gametes

    (d)

    Recessive factors

  2. Okasaki fragments are joined together by ___________________.

    (a)

    Helicase

    (b)

    DNA polymerase

    (c)

    RNA primer

    (d)

    DNA ligase

  3. The loss of one or more chromosome in a ploidy is called_____________.

    (a)

    Tetraploidy

    (b)

    Aneuploidy

    (c)

    Euploidy

    (d)

    polyploidy

  4. 2 x 1 = 2
  5. The pairs of contrasting character (traits) of Mendel are called_________

    ()

    alleles

  6. DNA consists of two ____________ chains

    ()

    polynucleotide

  7. 4 x 1 = 4
  8. Autosomes

  9. (1)

    2n

  10. Diploid condition

  11. (2)

    9:3:3:1

  12. Down’s syndrome

  13. (3)

    22 pair of chromosome

  14. Dihybrid ratio

  15. (4)

    Trisomy 21

    3 x 2 = 6
  16. Name the conditions when both the alleles are identical?

  17. What is the name given to the segments of DNA, which are responsible for the inheritance of a particular character?

  18. Name the bond which binds the nucleotides in a DNA.

  19. 2 x 4 = 8
  20. What are allosomes?

  21. Explain the structure of a chromosome

  22. 1 x 7 = 7
  23. How is the structure of DNA organised? What is the biological significance of DNA?

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