SEX LINKED INHERITANC OBJECTIVES

Multiple Choice Questions (MCQs)

I. Sex chromosomes were discovered by:

(a) Carl Correns (b) Nilsson Fhle(c) 1.1 1. Morgan           (d) Mendel

  1. The J shaped chromosome in drosophila is:

(a) Autosomes BO X chromosome(c) Y chromosome (d) I3othXY

  1. Match SRY with one of the followings:

(a) Female         (b) Male            (c) Autosomes              (d) None
The pattern of sex determination found in drosophila is:

(a) WZ-ZZ type                          (b) XY-XX

(e) X0- XX                                 (d ) Compound sex

  1. The pattern of sex determination in Protenor bug is:

(a) WZ-ZZ         (b) XY-XX         (c) X0- XX         (d) Compound sex

  1. Which of the followings is male in grasshopper?

(a) XX               (b) XY               (c) X                 (d) Y

  1. The pattern of sex determination in birds is

(a) Compound sex(b) X0- XX (c) XY-XX                 (d) WZ-ZZ type

  1. The female in butterflies is:

(a) XX              (b) XY               (c) X0                (d) X

  1. The pattern of sex determination in man is:

(a) Compound –‘b) X0- XX (c) XY-XX                    (d) XY-X X type

  1. Which of wit4.- “allowings is sterile female in man?

(a) XX              (b) XO               (c) XY                (d) XXY

  1. Which of the dlowings is sterile male in Drosophila?

(a) XX              (b)                    (c) XY                (d) XXY
II. In drosophila letermination of male depends on:

(a) X                (b)Y                  ) XX                  (d) Autosomes

  1. The phenomenon of sex linkage was discovered by:

(a) Carl Correns                         (b) Nilsson Ehle

(c) ‘EH. Morgan                         (d) Calvin Bridges

  1. Mutant white in drosophila was discovered by:\

a) Carl Carrells                          11) Calvin ridges

(c) T. H. Morgan                        (d) Nilsson Ellie

  1. Which of the followings is a V linked trait?

(a) Eye colour                           (b) Colour blindness

(c) SRY                                     (d) Haemophilia

  1. Sun light proteins are:

(a) Albumin      (b) Opsins         (c) I listone        (d) ‘fbrombin

  1. Deuteranopia is:

(a) Red blindness                      (I)) Blue blindness

(c) Green blindness                   (d) Black blindness


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  1. Tritanopia is:

(a) Red blindness                      IN Green blindness

(c) Blue blindness                      Id) Black blindness

  1. Protonopia is:

(a) Red blindness                      (h) Blue blindness

(c) Green blindness                   (d) Black blindness

  1. The partially functional opsin for red colour is:

(a) Protoanomalous                   (b) Protanopia

(c) Tritanopia                            (d) Deuteranomalous

  1. The partially functional opsin for green colour is:

(a) Protoanomalous                   (b) Protanopia

(c) Tritanopia                            (d) Deuteranomalous

Answers:

I. (c)    2. (c)    3. (b)   4. (c)    5. (a) 6. (d) 7. (b) 8. (c)
9. (b)   10. (b)II. (d)   12. (c)  13. (b) 14. (c) 15. (b) 16. 0)
17. (c)18. (a)  19. (a)  20. ((I)  

 

Fill in blanks

  1. A gamete without any sex chromosome is called ___________
    gamete.
  2. Female grasshopper has mu X chromosomes. Thus it is XX It

forms only one type or eggs. So it is ________

  1. tvpes’ pattern of sex determination is Ibund in
    grasshopper and Protenor bug.
  2. ________________ pattern of sex determination is found in
    Drosophila, man and many other organisms.
  3. type of sex – determination pattern is common in birds, butterflies and moths.
  4. Presence of___________ gene on Y chromosome is essential
    for starting the development of maleness in humans.
  5. X0 Turner’s syndrome in humans is produced by non‑

disjunction of chromosomes. It is a          female.

  1. In Drosophila X0 is a sterile _______
  2. XXY set of chromosomes in Drosophila produces a
    female. Ans:

I. Nullo           2. homgametic 3. XY-XX       4.XX-XY

5. ZZ-ZW        6. SRY            7. sterile          8. male
9. sterile

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