Difference between revisions of "Fertilisation"
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===About Fertilisation=== | ===About Fertilisation=== | ||
#In fertilisation the [[Sperm Cell|sperm cell]] uses enzymes in its head to get through the jelly coat of the [[ovum]]. | #In fertilisation the [[Sperm Cell|sperm cell]] uses enzymes in its head to get through the jelly coat of the [[ovum]]. | ||
| − | #The jelly coat then becomes hard, stopping any other [[Sperm Cell|sperm]] | + | #The jelly coat of the [[ovum]] then becomes hard, stopping any other [[Sperm Cell|sperm]] entering. |
| − | #The [[Sperm Cell|sperm cell]] then | + | #The [[Cell Membrane|cell membrane]] of the [[Sperm Cell|sperm cell]] then fuses with the [[Cell Membrane|cell membrane]] of the [[ovum]] and the [[Sperm Cell|sperm cell]] loses its tail. |
| − | #The [[Cell Nucleus|nucleus]] of the [[Sperm Cell|sperm cell]] is then released into the [[ovum]] and the [[Cell Nucleus|nuclei]] of the [[ | + | #The [[Cell Nucleus|nucleus]] of the [[Sperm Cell|sperm cell]] is then released into the [[ovum]] and the [[Cell Nucleus|nuclei]] of the [[ovum]] and [[Sperm Cell|sperm]] fuse to make one larger [[Cell Nucleus|nucleus]] with all the [[DNA]] needed to make a new [[organism]]. |
==Key Stage 4== | ==Key Stage 4== | ||
Revision as of 07:40, 25 July 2019
Contents
Key Stage 3
Meaning
Fertilisation is when the male and female sex cells come together to make one cell.
About Fertilisation
- In fertilisation the sperm cell uses enzymes in its head to get through the jelly coat of the ovum.
- The jelly coat of the ovum then becomes hard, stopping any other sperm entering.
- The cell membrane of the sperm cell then fuses with the cell membrane of the ovum and the sperm cell loses its tail.
- The nucleus of the sperm cell is then released into the ovum and the nuclei of the ovum and sperm fuse to make one larger nucleus with all the DNA needed to make a new organism.
Key Stage 4
Meaning
Fertilisation is when the male and female gametes come together to make one cell.
About Fertilisation
- During fertilisation the two haploid gametes fuse together to form a diploid cell.