K12 Comparative Embryology: Difference between revisions
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==Meiosis== | ==Meiosis== | ||
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| In the male and female in all animals (and plants) that reproduce sexually to form an embryo, these very first cells form by meiosis. | | valign=top|In the male and female in all animals (and plants) that reproduce sexually to form an embryo, these very first cells form by meiosis. | ||
Meiosis a reductive form of cell division that only occurs in the egg (oocyte) and sperm (spermatozoa) and allows new genetic combinations of offspring to be generated. | Meiosis a reductive form of cell division that only occurs in the egg (oocyte) and sperm (spermatozoa) and allows new genetic combinations of offspring to be generated. | ||
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# Genetic reorganisation - the genetic material (chromosomes) that you have from your mother and father are recombined. | # Genetic reorganisation - the genetic material (chromosomes) that you have from your mother and father are recombined. | ||
# Genetic reductive - the chromosome number is halved and only fertilisation will allow the paired chromosomes that we all contain in all our cells. | # Genetic reductive - the chromosome number is halved and only fertilisation will allow the paired chromosomes that we all contain in all our cells. | ||
| <html5media height="200" width="300">File:Oocyte_Meiosis_01.mp4</html5media> | | colwidth=305px|<html5media height="200" width="300">File:Oocyte_Meiosis_01.mp4</html5media> | ||
This movie shows the egg (oocyte) completing the first part of meiosis (meiosis I) the chromosomes are coloured blue. | This movie shows the egg (oocyte) completing the first part of meiosis (meiosis I) the chromosomes are coloured blue. | ||
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Revision as of 11:46, 5 September 2016
Embryology - 21 May 2024 Expand to Translate |
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K12 Professional Development 2016
Introduction
All human and animal embryos go through very similar stages of early development. See also Humans and Animal Embryology.
This page introduces a few of the concepts of development shared with all animals.
Meiosis
Mitosis
Patterning
Cite this page: Hill, M.A. (2024, May 21) Embryology K12 Comparative Embryology. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/K12_Comparative_Embryology
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