fertilisation in animals and plants

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  • Created by: taramdh
  • Created on: 23-04-18 11:51
where do primordial germ cells divide?
in gonads
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what is fertilisation?
the exact moment when the nuclei of the male and female gametes fuse.
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what is zona pellucida?
protective glycoprotein surrounding the egg cell membrane that sperm have to penetrate.
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how does mitochondria help sperm to move ?
it provides energy via respiration for the flagellum to move
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when does acrosome reaction occur ?
once one sperm makes contact with zona pellucida of the egg cell
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what is acrosome reaction?
digestive enzymes are released from the acrosome.,which digest the zona pellucida so sperm can move through it to the egg cell membrane of the egg cell
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what makes zona pellucida thicken and why?
chemicals from cortical granues,which.makes it impenetrable to other sperm.
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how is a diploid zygote produced in plants?
first male gamete fuses with with female gamete nucleus .
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how is a triploid zygote produced in plants?
second male gamete fuses with two polar nuclei producing a triploid primary endosperm nucleus.
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where does fertilisation take place in plants ?
in the embryo sac within the ovule
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what forms the seed's storage tissues?
a triploid cell (endosperm)
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when do males produce viable sperm?
puberty-death
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Other cards in this set

Card 2

Front

what is fertilisation?

Back

the exact moment when the nuclei of the male and female gametes fuse.

Card 3

Front

what is zona pellucida?

Back

Preview of the front of card 3

Card 4

Front

how does mitochondria help sperm to move ?

Back

Preview of the front of card 4

Card 5

Front

when does acrosome reaction occur ?

Back

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