BB: Asexual vs. Sexual Reproduction Please copy this chart in your notebook – use the WHOLE page. Name Type (asexual or sexual) What happens ? Organisms.

BB: Asexual vs. Sexual ReproductionPlease copy this chart in your notebook – use the WHOLE page.

NameType

(asexual or

sexual)

What happe

ns?

Organisms that use this

type

+Positives

-Negative

s

1. Binary Fission

2. Bacterial Conjugation

3. Fragmentation

4. Budding

5. Pollination

6. Sexual Reproduction

Asexual vs. Sexual Reproduction

Asexual reproduction

A form of reproduction which does not involve meiosis or fertilization. Asexual reproduction = one parent. The primary form of reproduction for single-celled organisms such as archaea, bacteria, and protists.Many plants and fungi reproduce mostly asexually as well.

Sexual Reproduction

Results in increasing genetic diversity of the offspring. Characterized by two processes:

meiosis, halving of the number of chromosomesfertilization, combination of two gametes and the restoration of the original number of chromosomes

During meiosis, chromosomes usually cross over = genetic recombination.Primary method of reproduction for the vast majority of visible organisms, including almost all animals and plants.

Binary Fission

AsexualCell splits and replicated DNA goes with each partProkaryotes, Bacteria+ Fast and easy- Everybody has the same DNA

Bacterial Conjugation

Asexual, “Sexual” A bacteria shoots out a tube and sends a piece of its DNA to another bacteriaBacteria+ Mixes DNA- “Parent” loses a little piece of DNA

Fragmentation/ regeneration

AsexualBody of parent breaks and produces offspringFungi, moss, sea stars, planarian+ Easy- Parent broken, same DNA

Fragmentation/ regeneration

Moss

Budding

AsexualOffspring grows out of parentYeast, hydras+ Fast, somewhat easy- Same DNA

Pollination

SexualPollen is delivered to female part of plantFlowering plants+ Plants don’t have to move, mixes DNA- Need external source for pollination to take place; wind, bee, bat, butterfly etc.

Pollination

Sexual Reproduction

SexualDNA from 2 individuals merge to form oneAnimals, Plants+ Diverse DNA- Takes a long time, 2 individuals needed

Sexual Reproduction

Numbers! (20 minutes or 1 year, 8 months)

Core Bacteria (Binary Fission)

Hydra(Budding)

Planaria, Starfish (Fragmentation)

Rabbits, Kittens, Humans(Sexual Reproduction)

Dandelions, Pine trees(Pollination)

1 12,731 (6)

504 (6) 2640 (5) 20,10,2 (2) 46, 3 (3)

2 23,313 (7)

610 (4) 3626 (6) 20,10,2 (4) 20, 2 (4)

3 20,697 (10)

450 (6) 2578 (8) 20, 10, 2 (3) 21, 1.5 (4)

4 22,994 (10)

613 (6) 2982 (5) 20, 10, 1.5 (4) 20, 1.5 (4)