Question

Given are some organisms.
(I) Fowl (II) Humans (III) Grasshopper
Following alphabets related to the given animals.
Male homogametic - A
Female heterogametic -B
Male heterogametic - C
Female homogametic - D
Which of the following options correctly describes the given animals in terms of sex determination?

• A. (I) A, B (II) C, D (III) C, D
• B. (I) C, D (II) A, B (III) C, D
• C. (I) A, D (II) C, D (III) A, D
• D. (I) B, C (II) C, D (III) A, B

Answer 1

The correct option is A (I) A, B (II) C, D (III) C, D

1) Fowl belongs to ZZ-ZW pattern- In this female is heterogametic while the male possesses two homomorphic chromosomes.

2) Humans belong to XX-XY pattern- Here the male possess one X and one Y chromosome means male is heterogametic while female possesses two homomorphic X-chromosomes.

3) Grasshopper belong to XX-XO pattern- Here the female has two X chromosomes(called XX), and mail has only one X-chromosomes(male heterogametic).

So, the correct option is '(I)A,B (II)C,D (III)C,D'.