Cloning - Science Fiction or Science Fact

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Cloning – Science Fiction or Science Fact?

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What we will do today

Extend knowledge on asexual reproduction and sexual reproduction

Learn how can animals be cloned

Look at problems with cloning

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What are clones?

Genetically

Identical

copies

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Hydra budding to make a clone

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Asexual Reproduction

Tiny 'buds' grow out from the hydra's side, develop mouth tentacles, and finally nip off at the base to form a separate individual.

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Amoeba dividing asexually

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Bacteria dividing asexually

These are CLONES as only have information from 1 parent

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Spider plant making asexual clones

Plants retain some

unspecialized cells

These cells have the

potential to grow

into a whole new

plant

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Strawberry plants making asexual clones

Whole new

plants grow

at the end

of the runners

How is this

Possible?

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Sexual reproduction

Information (genes) from 2 parents in the sperm and egg

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Sexual Reproduction in Plants

Pollen carries genes from the male part of plants this fertilizes the ovule (female sex cell)

POLLEN ovary

containing

OVULE

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Sexual reproduction gives variation

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Cloning mammals

Sexual reproduction produces variation not clones. Why?

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Identical Twins

Sperm fertilizes egg

Fertilized egg starts to divide into a embryo, but the cells separate and each cell becomes a baby

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