Zoology - Principles of Inheritance and Variation One Mark Questions

12th Standard EM

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Biology

Time : 00:30:00 Hrs
Total Marks : 10
    10 x 1 = 10
  1. Haemophilia is more common in males because it is a

    (a)

    Recessive character carried by Y-chromosome

    (b)

    Dominant character carried by Y-chromosome

    (c)

    Dominant trait carried by X-chromosome

    (d)

    Recessive trait carried by X-chromosome

  2. Which of the following phenotypes in the progeny are possible from the parental combination AxB?

    (a)

    A and B only

    (b)

    A,B and AB only

    (c)

    AB only

    (d)

    A,B,AB and O

  3. Which of the following phenotypes is not possible in the progeny of the parental genotypic combination IAIO X IAIB?

    (a)

    AB

    (b)

    O

    (c)

    A

    (d)

    B

  4. Which of the following is true about Rh factor in the offspring of a parental combination DdXDd (both Rh positive)?

    (a)

    All will be Rh-positive

    (b)

    Half will be Rh positive

    (c)

    About ¾ will be Rh negative

    (d)

    About one fourth will be Rh negative

  5. The ABO blood group was discovered by ________.

    (a)

    Sturli

    (b)

    Decastelle

    (c)

    Landsteiner

    (d)

    Alexander wiener

  6. The inheritance of blood group is determined by multiple alleles as discovered by _________.

    (a)

    Landsteiner

    (b)

    Bernstein

    (c)

    Alexander castelle

    (d)

    lyon

  7. The__________ is called null allele.

    (a)

    IA

    (b)

    IOIB

    (c)

    IO

    (d)

    IBIB

  8. The secretors have the I allele in _______.

    (a)

    tears

    (b)

    Gastric juice

    (c)

    Saliva

    (d)

    All of these

  9. _________ proposed the existence of 8 alleles at a single Rh locus.

    (a)

    Fischer

    (b)

    Landsteiner

    (c)

    Bernstein

    (d)

    Wiener

  10. XX - XO type of sex determination is in ______.

    (a)

    Cockroaches

    (b)

    Drosophila

    (c)

    Humans

    (d)

    Moths

  11. 5 x 1 = 5
  12. XO females

  13. (1)

    Barr body

  14. 3n female

  15. (2)

    Landsteiner

  16. Lyon

  17. (3)

    Aneuploidy

  18. I

  19. (4)

    Bridges

  20. R1

  21. (5)

    Wiener

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