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Paramecium Conjugation

Paramecium Conjugation. * Reminder *. Diploid = full set of chromosomes, one from each parent. (2N) - mitosis Haploid = ½ set of chromosomes. (N) - meiosis. Step 1:. Two paramecia attach together along their length. Each has 1 (2N) micronucleus and 1 macronucleus. Step 2:.

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Paramecium Conjugation

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  1. Paramecium Conjugation

  2. * Reminder * • Diploid = full set of chromosomes, one from each parent. (2N) - mitosis • Haploid = ½ set of chromosomes. (N) - meiosis

  3. Step 1: • Two paramecia attach together along their length. • Each has 1 (2N) micronucleus and 1 macronucleus.

  4. Step 2: • The macronuclei disintegrate and the diploid (2N) micronuclei undergo meiosis to form 4 (N) micronuclei.

  5. Step 3: • Three of the four micronuclei disintegrate. Only one remains.

  6. Step 4: • The remaining micronucleus divides by mitosis to form two (N) micronuclei that are identical to each other.

  7. Step 5: • The paremecia trade one of the two micronuclei. • They now have one old and one new micronucleus.

  8. Step 6: • The (N) micronuclei fuse to form one (2N) micronucleus. • N + N = 2N

  9. Step 7: • The macronucleus if formed from the (2N) micronucleus. • Paramecia separate from each other. • They are both now genetically identical to each other, but they both have new genetic material.

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