A sex aneuploid Drosophila has 2 sets of autosomes and sex chromosome complement XXY. This fly would be:

All the following are mechanisms of sex determination in living organisms except:
1. The Z-W system
2. The X-O system
3. The haplo-diploid system
4. The parthenogenetic system

In a certain taxon of insects, some have 17 chromosomes and 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