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this post was submitted on 17 Apr 2026
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That's what I wondered, yeah. I thought the yolk as a whole was the equivalent of the ovum, but apparently not, now that you've told. TIL!
But then, how does the blastodisc form?
To the best of my understanding, it works similar to how our reproductive cells do. Basically, a splitting up of genetic material followed by formation of the initial cell. Then, upon fertilization, you get the same process of cellular multiplication as mammals undergo.