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

Asexual vs. Sexual Reproduction

NameType

(asexual or

sexual)

What happens?

Organisms that use this

type

+Positive

s

-Negatives

1. Binary Fission asexual Cell splits and replicated DNA goes with each part

Prokaryotes, Bacteria

Fast and easy Everybody has the same DNA

2. Bacterial Conjugation

Asexual A bacteria shoots out a tube and sends a piece of its DNA to another bacteria

Bacteria Mixes DNA “Parent” loses a little piece of DNA

3. Fragmentation

Asexual Body of parent breaks and produces offspring

Fungi, moss, sea stars, planarian

Easy Parent broken, same DNA

4. Budding Asexual Offspring grows out of parent

Yeast, hydras Fast, somewhat easy

Same DNA

5. Pollination Sexual Pollen is delivered to female part of plant

Flowering plants

Plants don’t have to move, mixes DNA

Need external source for pollination to take place; wind, bee, bat, butterfly etc.

6. Sexual Reproduction

Sexual DNA from 2 individuals merge to form one

Animals, plants Diverse DNA Takes a long time, 2 individuals needed

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)