2. Are You Another Einstein?

3. Take 5 minutes to answer this question in your notebook…

4. Mules result when a horse mates with a donkey. A donkey sperm cell contains 31 chromosomes and a horse egg cell contains 32, therefore the zygote would have 63. The zygote can develop normally via mitosis, but the mule offspring is sterile (meiosis cannot occur normally in the testes or ovaries). Explain why mitosis is normal in cells that contain horse and donkey chromosomes, but meiosis is not.

5. 5 minutes Mules result when a horse mates with a donkey. A donkey sperm cell contains 31 chromosomes and a horse egg cell contains 32, therefore the zygote would have 63. The zygote can develop normally via mitosis, but the mule offspring is sterile (meiosis cannot occur normally in the testes or ovaries). Explain why mitosis is normal in cells that contain horse and donkey chromosomes, but meiosis is not.

6. 4 minutes Mules result when a horse mates with a donkey. A donkey sperm cell contains 31 chromosomes and a horse egg cell contains 32, therefore the zygote would have 63. The zygote can develop normally via mitosis, but the mule offspring is sterile (meiosis cannot occur normally in the testes or ovaries). Explain why mitosis is normal in cells that contain horse and donkey chromosomes, but meiosis is not.

7. 3 minutes Mules result when a horse mates with a donkey. A donkey sperm cell contains 31 chromosomes and a horse egg cell contains 32, therefore the zygote would have 63. The zygote can develop normally via mitosis, but the mule offspring is sterile (meiosis cannot occur normally in the testes or ovaries). Explain why mitosis is normal in cells that contain horse and donkey chromosomes, but meiosis is not.

8. 2 minutes Mules result when a horse mates with a donkey. A donkey sperm cell contains 31 chromosomes and a horse egg cell contains 32, therefore the zygote would have 63. The zygote can develop normally via mitosis, but the mule offspring is sterile (meiosis cannot occur normally in the testes or ovaries). Explain why mitosis is normal in cells that contain horse and donkey chromosomes, but meiosis is not.

9. 1 minute Mules result when a horse mates with a donkey. A donkey sperm cell contains 31 chromosomes and a horse egg cell contains 32, therefore the zygote would have 63. The zygote can develop normally via mitosis, but the mule offspring is sterile (meiosis cannot occur normally in the testes or ovaries). Explain why mitosis is normal in cells that contain horse and donkey chromosomes, but meiosis is not.

10. 10 seconds

11. 9 seconds

12. 8 seconds

13. 7 seconds

14. 6 seconds

15. 5 seconds

16. 4 seconds

17. 3 seconds

18. 2 seconds

19. 1 second

20. It’s Time to Start Class! E =MC 2

21. Each chromosome is on it’s own in mitosis-chromosome replication and separation occurs independently for each horse and donkey chromosome. In meiosis homologous chromosomes must pair in Prophase I. This cannot occur (nor can synapsis) because there is not an equal number of horse and donkey chromosomes in the diploid cell.