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Asexual vs Sexual Reproduction

Objective:  Using “asexual and sexual reproduction,” I can identify the advantages and disadvantages of each based on the number of parents and how that affects the inheritance of traits.

Learning Standard: LS -9 compare sexual and asexual reproduction

Overview

asexual table

Types of Asexual Reproduction

Binary Fission:

Single celled organism divides its cytoplasm and nucleus to form two identical organisms

BinaryFission

Budding:

Parent divides its nucleus equally but cytoplasm unequally. Offspring grows and breaks off from parent.

budding

Sporulation:

Specialized single cells are released from one parent and grow by cell division (mitosis)

Lycoperdon_pyriforme

Regeneration:

The process by which certain cells produce new tissue growth at the site of a wound or lost limb.

Limb Regeneration

Fragmentation:

A single parent breaks into parts that regenerate into whole new individuals.

Screen shot 2013-02-07 at 6.58.39 PM

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Sexual Reproduction

Occurs in all members of the animal kingdom:

Fish
Mammals
Amphibians
Birds
Reptiles
Insects
Crustaceans

Plant kingdom:

Flowers are the reproductive organs of plants

Some flowers have both male and female reproductive organs on the same flower.

Happens 2 ways

Internally (inside)
The egg is fertilized by sperm inside the female

– Mammals, birds, reptiles, insects, spiders

Screen shot 2013-02-07 at 7.13.24 PMExternally (outside)

The egg is fertilized by sperm outside the female

The female lays the eggs and then the male fertilizes them.

– Fish and some amphibians
– Plants

Examples of organisms that reproduce sexually

– Chickens – Iguanas – Lobsters – Sharks

– Humans – Butterflies – Sunflowers – Roses

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