Question

ordering question
click and drag on elements in order
construct the correct sequence of events for meiosis i, starting at the top.
instructions
paired homologues align at the equator, microtubules attach to kinetochores of sister chromatids.
separated homologues cluster at each pole.
microtubules shorten, chiasmata are broken, homologous chromosomes are pulled to opposite poles.
chromosomes condense, forming of spindle apparatus begins, homologous chromosomes pair and crossing over occurs.
nuclear envelope re-forms around each daughter nucleus.

Explanation:

The events of meiosis I follow the order of prophase I, metaphase I, anaphase I, telophase I. Prophase I involves chromosome condensation, spindle formation, homolog pairing, and crossing over. Metaphase I has paired homologs aligning at the equator. Anaphase I includes microtubule shortening, chiasmata breaking, and homologs moving to opposite poles. Telophase I involves homologs clustering at poles and nuclear envelope reformation.

Answer:

1. Chromosomes condense, forming of spindle apparatus begins, homologous chromosomes pair and crossing over occurs.
2. Paired homologues align at the equator, microtubules attach to kinetochores of sister chromatids.
3. Microtubules shorten, chiasmata are broken, homologous chromosomes are pulled to opposite poles.
4. Separated homologues cluster at each pole.
5. Nuclear envelope re-forms around each daughter nucleus.