3/20/20153/20/2015

Starter:Starter:

Quiz

202202 204204 Sexual and Asexual Reproduction Sexual and Asexual Sexual and Asexual Reproduction Sexual and Asexual Reproduction Reproduction

Practice:Practice: Asexual or sexual reproduction Asexual or sexual reproduction Activity Activity

Exit:Exit:Explain the difference between sexual and asexual reproduction.

3/20/20153/20/2015Application:Application:

Glue notes hereGlue notes here

Connection: Connection:

Ws

March 20, 2015

AGENDA

 TEKS 7.14B

compare the results of uniform

or diverse offspring from

sexual reproduction or

asexual reproduction

1. Quiz2. Activity3. Ws4. Exit

DateDate Lecture/ Activity/ Lab Lecture/ Activity/ Lab Page Page3/18 Probability lab 199-2003/18 Probability lab 199-2003/19 Monster Genetics 201-2023/19 Monster Genetics 201-202

Reproduction: Reproduction: Asexual vs. Asexual vs.

SexualSexual

TEKS 7.14B compare the results of uniform or divers offspring from sexual reproduction

or asexual reproduction

ReproductionReproduction is important for the survival of all living speciesspecies.

Without a way to reproduce, lifelife would come to an endend.

There are two types of

reproduction, asexual & sexual.

Sexual reproducti

on

Sexual reproduction

involves fertilization

so it typically requires the sex cells of

twotwo parents.

Advantages of Sexual

Reproduction:The offspring will be different from its parents.

Advantages of Sexual

Reproduction:Genetic variation allows the species

to adapt to its surroundings.

Advantages of Sexual

Reproduction:“Good” traits are passed on

and strengthen the species which increases their survival rate.

Advantages of Sexual

Reproduction:The fertilized

egg can sometimes survive in adverse

conditions.

Requires two sets of sex cells (egg and sperm) usually produced by twotwo parents that must get together to mate.

Disadvantages of Sexual

Reproduction:

Often slower, more complexcomplex & less less reliable reliable than asexual reproduction.

Disadvantages of Sexual

Reproduction:

Most animals reproduce sexually. (fly, human, snake,

frog)

Examples of Sexual

Reproduction:

All flowering plants and those that make seeds

reproduce sexually. (daffodil, grass, rose, oak

tree).

Examples of Sexual Reproduction:

Fertilization may be internal

(mammals, birds, reptiles) or

external (frogs, fish).

Examples of Sexual Reproduction:

Asexual Reproducti

on

Asexual reproduction involves oneone parent & results in an exactexact duplicate of an organism.

Usually faster and easiereasier, so a new plant or animal can colonize an area more quicklyquickly.

Advantages of Asexual

Reproduction:

A matemate does not have to be found so no travel is involved which saves energyenergy.

Advantages of Asexual

Reproduction:

Less complex and more reliable.

Advantages of Asexual

Reproduction:

Can produce a large number of offspringoffspring very quicklyquickly.

Advantages of Asexual

Reproduction:

The new organisms are genetically identicalidentical to their parent and each other.

Disadvantages of Asexual

Reproduction:

Adaptation does not occur.

Disadvantages of Asexual

Reproduction:

Organisms with no

variationvariation that cannot adapt may become

extinctextinct.

Disadvantages of Asexual

Reproduction:

Examples of Examples of Asexual Asexual

Reproduction:Reproduction:Plants and fungi Plants and fungi that make that make sporesspores (mosses, ferns, (mosses, ferns,

mold, mold, mushrooms) mushrooms)

SporesSpores

Single cells, which Single cells, which reproduce by reproduce by

binary fission or binary fission or splittingsplitting in two in two

(amoeba, (amoeba, bacteria).bacteria).

Examples of Examples of Asexual Asexual

Reproduction:Reproduction:

Binary Binary fissionfission

BuddingBudding: Spider : Spider plants and hydras plants and hydras

form new organisms form new organisms when when part of the part of the

parent breaks off to parent breaks off to form a daughter cell form a daughter cell

that grows into a new that grows into a new individual that is individual that is identical to the identical to the

parent.parent.

BuddingBudding

RunnersRunners: Grass and : Grass and strawberries can form strawberries can form horizontal stems that horizontal stems that grow on top of or just grow on top of or just

below the ground below the ground which can produce which can produce

new plants new plants horizontally at nodes horizontally at nodes

or tips along the or tips along the stem.stem.

RunnerRunnerss

FragmentationFragmentation: : Some plants, Some plants, planarian and planarian and

other worms can other worms can be be split into many split into many

fragments that fragments that each grow into new each grow into new

identical identical individuals.individuals.

FragmentatiFragmentationon

RegenerationRegeneration: : Type of Type of

fragmentation in fragmentation in which starfish, which starfish,

lizards & lizards & sponges can sponges can

grow back body grow back body parts that are parts that are

damaged or lost.damaged or lost.

  

3/20/20153/20/2015

Starter:Starter:

Quiz

202202 204204 Sexual and Asexual Reproduction Sexual and Asexual Sexual and Asexual Reproduction Sexual and Asexual Reproduction Reproduction

Practice:Practice: Asexual or sexual reproduction Asexual or sexual reproduction Activity Activity

Exit:Exit:Explain the difference between sexual and asexual reproduction.

3/20/20153/20/2015Application:Application:

Glue notes hereGlue notes here

Connection: Connection:

Ws