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Which of the following is correct w.r.t ZO-ZZ type of sex determination?
1) Females carry odd sex chromosomes.
2) Females are heterogametic.
3) Males are homogametic.
4) Males carry odd sex chromosomes.
Option: 1
1, 2 & 4
Option: 2
1, 2 & 3
Option: 3
2, 3 & 4
Option: 4
All of these
Answers (1)
As we have studied in:
Sex Determination: Z0 Female & ZZ Males Type -
- The females have odd sex chromosomes (AA + Z0) while the males have two homomorphic sex chromosomes.
- The females are heterogametic, producing two types of gametes; half with X-chromosome and the other half without any sex chromosome.
- It is seen in butterflies and moths.
- Females are heterogametic and carry odd sex chromosomes (ZO) in ZO-ZZ type of sex chromosomes. Males are homogametic (ZZ).
Hence, the correct answer is option b.
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