Z Z / ZW type of sex determination is seen in:
1. Platypus
2. Snails
3. Cockroach
4. Peacock
Subtopic:  Sex Determination |
 86%
From NCERT
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In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are:
1. males and females, respectively
2. females and males, respectively
3. all males
4. all females
Subtopic:  Sex Determination |
 82%
From NCERT
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