Biology: Human Reproduction and Embryonic Development Stages

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Last updated 2:25 AM on 4/29/26
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16 Terms

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Sperm

The male sex cell; haploid (n).

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Egg/Ovum

The female sex cell; haploid (n).

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Zygote

A fertilized egg; diploid (2n).

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Haploid?

One set of chromosomes (n).

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Diploid?

Two sets of chromosomes (2n).

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Fertilization?

The process where sperm joins egg.

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Cleavage?

Rapid cell division without growth.

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Morula?

A solid ball of cells.

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Blastula/Blastocyst?

A hollow ball of cells.

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Gastrula?

The stage where germ layers form.

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Neurula?

The stage when the nervous system begins forming.

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Organogenesis?

The process where organs start developing.

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stages of animal development in order?

Sperm + Egg → Zygote → Cleavage → Morula → Blastula → Gastrula → Neurula → Organogenesis.

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Hydra reproduction

budding

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Paramecium reproduction

binary fission/conjugation.

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Where does fertilization happen in humans?

fallopian tube