Difference between Ugly Duckling and Oogonium

UGLY DUCKLING vs OOGONIUM: NOUN

A young person who is ugly, but who is expected to become beautiful as they mature.
One that is considered ugly or unpromising at first but has the potential to become beautiful or admirable in maturity.
An ugly or unpromising child who grows into a beautiful or worthy person

An immature ovarian egg within a developing fetus
A special cell in certain cryptogamous plants containing oöspheres, as in the rockweeds (Fucus), and the orders Vaucherieæ and Peronosporeæ.
In botany, the female sexual organ in certain cryptogamic plants.
One of the youngest ovarian cells, characterized by having in its nucleus the same number of chromosomes as in the nuclei of the somatic or body-cells. The oögonia, which eventually give rise to the primary oöcytes, are homologous in the oögenesis with the spermatogonia in the spermatogenesis of the male animal of the same species.
In zoology: The primordial mother-cell which gives rise to the ovum and its follicle.
A female reproductive structure in certain thallophytes and in oomycetes, usually a rounded cell or sac containing one or more oospheres.
Any of the cells that give rise through mitosis to the oocytes and are found in the ovaries of vertebrates.

Mangy, Sickly, Decrepit, Homely, Gamine, Eyesore, Unlovable, Ingenue, Gawky, Unlovely, Frumpy, Unloved, Frump, Ugly, Unattractive

Antherozoid, Gynogenesis, Conceptacle, Ovotestis, Graafian follicle, Spermospore, Reproductive structure, Spermatogonium, Oosporangium, Ootid, Proembryo, Pseudovum, Egg cell, Gonocyte, Oosphere

Mangy, Sickly, Decrepit, Homely, Gamine, Eyesore, Unlovable, Ingenue, Gawky, Unlovely, Frumpy, Unloved, Frump, Ugly, Unattractive

Antherozoid, Gynogenesis, Conceptacle, Ovotestis, Graafian follicle, Spermospore, Reproductive structure, Spermatogonium, Oosporangium, Ootid, Proembryo, Pseudovum, Egg cell, Gonocyte, Oosphere

As Pegram puts it, "the ugly duckling grew into a beautiful swan," and gave Pegram his moon walk.
We took our really ugly duckling and transformed it into a home style that we invisioned.
Perhaps the best known story about a swan is " The Ugly Duckling " fable.
Essentially, this book is the ugly duckling book about a horse.
The rain was still pouring down, an ugly duckling that never made it to swan.
The Bissell Steam Shot Deluxe is an ugly duckling that packs a punch.
Once again, I will be the big, fat, ugly duckling of my family.
Well, as it turned out, he was just a really ugly duckling.
Matt turned my Ugly Duckling Appartment into a beautiful Swan!
Participants: Luis Felipe Fabre and Ugly Duckling Presse Committee.

Each oogonium produces a singleegg, which is liberated through the gelatinizedapex of the wall.