Fertilisation in plants Flashcards

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1
Q

how does fertilisation in plants happen?

A

When nucleus of pollen ( with male DNA) joins the nucleus of the egg/ovule ( with female DNA)

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2
Q

Name of plants that produce and bear their seeds in fruits

A

Angiosperms

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3
Q

What is sporogenesis?

A

Produces haploid megaspores and microspores from mother cells

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4
Q

What is gametogenesis?

A

Production of gametes from these spores

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5
Q

On what 2 conditions will the pollen grain germinate?

A

-If pollen grain and stigma it attaches to is of same species
-But not the same plant to prevent self-fertilisation

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6
Q

What happens after pollen lands on stigma?

A

Pollen tube begins to grow

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7
Q

What occurs while generative cell travels down the tube?

A

Divides simultaneously by mitosis, 2 male nuclei formed.

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8
Q

Why is growth of pollen tube rapid?

A

Because of fast elongation of cell

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9
Q

Once tube has entered micropyle what happens?

A

Double fertilisation:
-One male nucleus fuses with nuclei of 2 the polar bodies to form triploid nucleus
-The other one fuses with egg cell to form diploid zygote

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10
Q

What is micropyle?

A

Small opening of the ovule in plants

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