Biology SL
Biology SL
4
Chapters
553
Notes
Theme A - Unity & Diversity
Theme A - Unity & Diversity
Theme B - Form & Function
Theme B - Form & Function
Theme C - Interaction &  Interdependence
Theme C - Interaction & Interdependence
Theme D - Continuity & Change
Theme D - Continuity & Change
IB Resources
Theme D - Continuity & Change
Biology SL
Biology SL

Theme D - Continuity & Change

Unlocking Blastocyst Development & Implantation

Word Count Emoji
544 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 14th Jun 2024

Table of content

Hey Biology Buffs! 🌱 Welcome to the coolest guide on how a single cell — the zygote — turns into a tiny human! 👶 Get ready to dive into the world of blastocysts, endometrium, and tiny cellular mitosis parties! 🎉

Zygote - The First Dance 🌟

  • What’s a Zygote?

    • It's a single cell formed when a sperm and an egg meet and merge. It has two haploid nuclei—one from mom’s egg and one from dad’s sperm. Imagine it as the ultimate collab!
  • DNA Replication

    • 6 hours post-fertilization: Each nucleus starts making a copy of its DNA. It's like downloading the same app on two different phones!
    • Takes about 3 hours to finish.
  • Change in Gene Expression

    • 30 hours later: Big changes happen in what genes are "turned on" or "off." Imagine it like customizing the settings of your new app.
  • Mitosis

    • The nuclei split into two genetically identical diploid nuclei via mitosis. The cell then divides, giving us two cells. It’s like cell-division TikTok—going viral in no time!

Embryo - Cell Party Central! 🌟

  • Rapid Rounds of Cell Division

    • Cells double roughly every 18 hours. Picture it like a fast-growing social media following.
  • Size Matters, or Does it?

    • The cells get smaller because they're dividing without growing. Imagine cutting a pizza into more and more slices without making the pizza any bigger.
  • Becoming a Blastocyst

    • By day 6 or 7: The embryo turns into a hollow ball called a blastocyst, thanks to some cells moving around and dividing differently. It's like going from a solid chocolate ball to a chocolate truffle!

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IB Resources
Theme D - Continuity & Change
Biology SL
Biology SL

Theme D - Continuity & Change

Unlocking Blastocyst Development & Implantation

Word Count Emoji
544 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 14th Jun 2024

Table of content

Hey Biology Buffs! 🌱 Welcome to the coolest guide on how a single cell — the zygote — turns into a tiny human! 👶 Get ready to dive into the world of blastocysts, endometrium, and tiny cellular mitosis parties! 🎉

Zygote - The First Dance 🌟

  • What’s a Zygote?

    • It's a single cell formed when a sperm and an egg meet and merge. It has two haploid nuclei—one from mom’s egg and one from dad’s sperm. Imagine it as the ultimate collab!
  • DNA Replication

    • 6 hours post-fertilization: Each nucleus starts making a copy of its DNA. It's like downloading the same app on two different phones!
    • Takes about 3 hours to finish.
  • Change in Gene Expression

    • 30 hours later: Big changes happen in what genes are "turned on" or "off." Imagine it like customizing the settings of your new app.
  • Mitosis

    • The nuclei split into two genetically identical diploid nuclei via mitosis. The cell then divides, giving us two cells. It’s like cell-division TikTok—going viral in no time!

Embryo - Cell Party Central! 🌟

  • Rapid Rounds of Cell Division

    • Cells double roughly every 18 hours. Picture it like a fast-growing social media following.
  • Size Matters, or Does it?

    • The cells get smaller because they're dividing without growing. Imagine cutting a pizza into more and more slices without making the pizza any bigger.
  • Becoming a Blastocyst

    • By day 6 or 7: The embryo turns into a hollow ball called a blastocyst, thanks to some cells moving around and dividing differently. It's like going from a solid chocolate ball to a chocolate truffle!

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Biology SL. Subscribe now and get closer to that 45 🌟