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Summary Fertilisation and development

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2025/2026 Written for academic year
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12th Grade
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Life Sciences
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In depth notes on fertilisation and development . Concepts are broken down for content to be understood easier. Can also be used as a study guide to help with exam prep

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FERTILIZATION,,,
DEVELOPMENT
AND GESTATION

, FERTILIZATION
DURING COPULATION (SEXUAL INTERCOURSE) THE PENIS IS INSERTED INTO
THE VAGINA AND SPERM CELLS ARE RELEASED THROUGH EJACULATION
CLOSE TO THE CERVIX. THE SPERM CELLS SWIM THROUGH THE CERVIX UP
INTO THE UTERUS AND THROUGH THE FALLOPIAN TUBES.

THE HAPLOID OVUM RELEASED DURING OVULATION ENTERS THE
FALLOPIAN TUBES. IF AN OVUM (HAPLOID) IS PRESENT IN THE FALLOPIAN
TUBES, ONE SPERM CELL (HAPLOID) MAY PENETRATE THROUGH THE
JELLY LAYER AND FERTILISE THE OVUM RESULTING IN A DIPLOID ZYGOTE.
THE NUCLEUS OF THE OVUM AND THE NUCLEUS OF THE SPERM CELL
FUSE RESULTING IN FERTILISATION.

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Subjects

  • fertilisation
  • grade 12
  • human reproduction
  • female reproductive
  • biology
  • life science

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