Meiosis II: The Final Stages
Meiosis II wraps up with Telophase II ✨:
– Chromosome groups get enclosed by new nuclear envelopes.
– Cytokinesis (cell splitting) happens right after!
– Result? Four haploid daughter cells 🎯 (called a tetrad).
Check out Figure 10.4 to see all Meiosis II stages: Prophase II → Metaphase II → Anaphase II → Telophase II.
Why Meiosis Matters Big Time! 🌱
Meiosis does two super important jobs:
- Keeps chromosome numbers stable across generations 👨👩👧👦:
Even though it halves the chromosome number (from diploid to haploid), it ensures each species keeps its unique count when parents make offspring. - Creates genetic variety 🧬:
Shuffles genes between generations, making everyone in a population a little different. This variation is crucial for evolution!
Quick Recap: Life & Cell Division 🔄
Remember:
- Cells come from preexisting cells (thanks, cell theory! 🧫).
- Sexually reproducing organisms start as a single-celled zygote.
- Cell division never stops—it happens throughout an organism’s life!
NEET Power Concepts ⚡️
Top 3 must-knows for exams:
- Telophase II outcome: Produces 4 haploid cells (tetrad).
- Meiosis significance: (a) Preserves species’ chromosome number, (b) Boosts genetic diversity for evolution.
- Zygote role: Starting point of life in sexual reproduction (single cell → whole organism).
