Prophase I

Q. Tetrad formation occurs in phase of prophase I of meiosis I.

1. leptotene
2. zygotene
3. pachytene
4. diplotene

Q.

Which one of the following is the correct sequence of sub stages of prophase- I of meiosis?

1. Leptotene — Zygotene — Pachytene — Diplotene — Diakinesis

2. Leptotene — Zygotene — Pachytene — Diakinesis — Diplotene

3. Leptotene — Pachytene — Zygotene — Diplotene — Diakinesis

4. Leptotene — Diplotene — Zygotene — Diakinesis — Pachytene

Q. Match the stages of meiosis in Column I to their characteristic features in Column II and select the correct option using the codes given below:

1. a-->ii., b-->iv., c-->iii., d-->i
2. a-->iv., b-->iii., c-->ii., d-->i
3. a-->iii., b-->iv., c-->ii., d-->i
4. a-->i., b-->iv., c-->ii., d-->iii

Q. Attachment of spindle fibres to kinetochores of chromosomes becomes evident in:

1. Metaphase
2. Prophase
3. Anaphase
4. Telophase

Q.

What is the least number of meiotic and mitotic divisions required to produce 500 male gamets respectively from the microspore mother cells in angiosperms?