Observe the sex determination in the following:- 
I. Human males = XY
II. Female hen = ZW
III. Male Drosophila = XY
IV. Male grasshopper = XO
V. Male birds = ZZ
Male heterogamety = A
Female heterogamety = B
Male homogamety = C

Which of the following combination is correct?

1. A–I, III, IV, B–II, C–V

2. A–II, IV, B–I, C–III

3. A–II, IV, B–I, C–II

4. A–III, IV, B–II, C–I

It is unfortunate that in our society women are blamed for producing female children and have been ostracised and ill-treated because:

A couple has a daughter. What is the probability that their next child will be a daughter?

(1) 0 %

(2) 25 %

(3) 50 %

(4) 100 %

Sex of progeny is determined by female parent in

1. Drosophila

2. Bird

3. Human

4. Grasshopper

Heterogametes are produced by

1. Human female

2. Female grasshopper

3. Female Drosophila

4. Female bird

A woman receives her X chromosomes from:

1. Her mother only

2. Her father only

3. Both her mother and father 

4. Mitochondria of mother only

50% of the male gametes have only autosomes and the rest 50% have both autosomes and one sex chromosomes in

1. Grasshopper

2. Drosophila

3. Birds

4. Butterflies

During his observation of spermatogenesis in a few insects, Henking found that a nuclear structure was received by 50 % of the sperms. What did he call this structure?

1. X – body

2. Y – body

3. X – chromosome

4. Y – chromosome

Choose correct option with respect to given figure for determination of sex by chromosomal differences.

1.  b after spermatogenesis forms only one type of gametes

2.  b & c represents same sex

3.  a, d are heterogametic

4.  Sex determination in d is similar to grasshopper 

Which of the following is developed by parthenogenesis:

A.Drones

B.Queen Honey bee

C.Worker honey bee

D.Both B and C