2. a. What are the main differences between cells in leptonema and those in pach
ID: 3166496 • Letter: 2
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2. a. What are the main differences between cells in leptonema and those in pachynema? b. What accounts for these differences? 3. Can you see chromomeres at leptonema 4. During what stage(s) can you see the nucleolus? 5. How does diplonema differ from diakinesis? 6. a. Can you see chiasmata at diplonema and diakinesis? b. How many chiasmata occur per bivalent (tetrad)? 7. a. How many tetrads can you count at diakinesis? b. How many chromosomes are present in a maize pollen mother cell nucleus at diakinesis? c Are these cells haploid or diploid?Explanation / Answer
2. (A) leptonema is the early stage of mieosis cells , in this stage chromatin start conndensing and appear as thin filaments well separated to each other. whereas pachynema cells are third stage meiotic cells in which chromosomes become short and thick and divide into four distinct chromatids.
?(B) synaptonemal complex is the protien complex that is responsible for chromosomes pairing, synapsis and homologous recombination.
?3. NO at leptotene stage sister chromatids are visually indistinguishable.
?5.At diplotene stage homologous chromosomes start to separate and synaptonemal complex degrades but the chasmata is only clearly visible until the diakinesis stage of meiosis.
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