LS4-3. Analyze displays of pictorial data to compare patterns of similarities in the embryological development across
multiple species to identify relationships not evident in the fully formed anatomy
What is Reproduction?
The two basic forms are asexual and sexual
"Courtesy: National Human Genome Research Institute" genome.gov
Gametes
A gamete is a reproductive cell of an animal or plant. In animals, female gametes are called ova or egg cells, and male gametes are called sperm
"Courtesy: National Human Genome Research Institute" genome.gov
CC0 1.0 Universal
"Courtesy: National Human Genome Research Institute" genome.gov
Gametes
A gamete is a reproductive cell of an animal or plant. In animals, female gametes are called ova or egg cells, and male gametes are called sperm
"Courtesy: National Human Genome Research Institute" genome.gov
Gametes
A gamete is a reproductive cell of an animal or plant. In animals, female gametes are called ova or egg cells, and male gametes are called sperm
"Courtesy: National Human Genome Research Institute" genome.gov
- Using the terms you learned here, describe fertilization
- Is a GAMETE haploid or diploid? Explain why you chose your answer
here's an idea, create a type of puzzle where fertilization steps can be put together
Gametes are an organism's reproductive cells
A female produces a larger gamete called an OVUM or EGG A male produces SPERM CELLS or spermatozoa which are small and motile GAMETES contain one set of chromosomes (known as haploid). This is half the genes needed to form a complete organism During fertilization, a spermatozoon and ovum unite and form a new diploid cell which is called an ZYGOTE
1. What is a zygote?
what is an embryo?
An embryo is the initial stage of development of a multicellular organism
Embryonic development begins with the fertilization of an egg cell (ovum) by a sperm cell (spermatozoon). The pair of gametes (another term for egg and sperm) becomes the first diploid cell and is known as a zygote The zygote undergoes mitotic divisions without growing in size (a process known as cleavage) and cellular differentiation, leading to development of a multicellular embryo
from fertilization to embryo
Next
Step 6
Step 5
Target
By OpenStax College - Anatomy & Physiology, Connexions Web site. http://cnx.org/content/col11496/1.6/, Jun 19, 2013., CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=30148596
What is Embryology?
Ontogeny is the origin, growth, and development of an organism. It is a story of the changes from the beginning of life through adulthood and aging. Here we see drawings of animals from early embryo through birth. All animals follow a path which is similiar
German naturalist Ernst Haeckel (1834-1919) is known for the phrase “ontogeny recapitulates phylogeny”. His theory was that all animals followed the same pattern of embryonic development. A chick embryo early in development looks like a fish, complete with fins, gills, and a fishy tail. Then it resembles a reptile, and finally looks like a chick. Likewise, a human embryo resembles a fish, then a reptile and finally a human.
ref: ef: https://www.brighthubeducation.com/science-homework-help/8067-ontogeny-recapitulates-phylogeny-ernst-haeckels-theory/
Human embryo at 4 weeks
zebra fish embryo
Kangaroo embryo in pouch*
©2016, WebMD, LLC. All rights reserved
Three different species, and yet the phases they go through during embryogenesis look very similar. Here we have 2 mammals, one is a monotreme (kangaroo) and a fish! All vertebrates; very different when fully developed, yet embryologically similar
* photographer is Ederic Slater via https://www.scienceimage.csiro.au/image/2059/a-fifty-day-old-kangaroo-in-pouch/2
Human embryo at 8weeks
Interactive LS4-3 Embryonic Development
Irene S Margitich
Created on September 15, 2022
beginning embryology modifications
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Transcript
LS4-3. Analyze displays of pictorial data to compare patterns of similarities in the embryological development across multiple species to identify relationships not evident in the fully formed anatomy
What is Reproduction?
The two basic forms are asexual and sexual
"Courtesy: National Human Genome Research Institute" genome.gov
Gametes
A gamete is a reproductive cell of an animal or plant. In animals, female gametes are called ova or egg cells, and male gametes are called sperm
"Courtesy: National Human Genome Research Institute" genome.gov
CC0 1.0 Universal
"Courtesy: National Human Genome Research Institute" genome.gov
Gametes
A gamete is a reproductive cell of an animal or plant. In animals, female gametes are called ova or egg cells, and male gametes are called sperm
"Courtesy: National Human Genome Research Institute" genome.gov
Gametes
A gamete is a reproductive cell of an animal or plant. In animals, female gametes are called ova or egg cells, and male gametes are called sperm
"Courtesy: National Human Genome Research Institute" genome.gov
here's an idea, create a type of puzzle where fertilization steps can be put together
Gametes are an organism's reproductive cells
A female produces a larger gamete called an OVUM or EGG A male produces SPERM CELLS or spermatozoa which are small and motile GAMETES contain one set of chromosomes (known as haploid). This is half the genes needed to form a complete organism During fertilization, a spermatozoon and ovum unite and form a new diploid cell which is called an ZYGOTE
1. What is a zygote?
what is an embryo?
An embryo is the initial stage of development of a multicellular organism
Embryonic development begins with the fertilization of an egg cell (ovum) by a sperm cell (spermatozoon). The pair of gametes (another term for egg and sperm) becomes the first diploid cell and is known as a zygote The zygote undergoes mitotic divisions without growing in size (a process known as cleavage) and cellular differentiation, leading to development of a multicellular embryo
from fertilization to embryo
Next
Step 6
Step 5
Target
By OpenStax College - Anatomy & Physiology, Connexions Web site. http://cnx.org/content/col11496/1.6/, Jun 19, 2013., CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=30148596
What is Embryology?
Ontogeny is the origin, growth, and development of an organism. It is a story of the changes from the beginning of life through adulthood and aging. Here we see drawings of animals from early embryo through birth. All animals follow a path which is similiar
German naturalist Ernst Haeckel (1834-1919) is known for the phrase “ontogeny recapitulates phylogeny”. His theory was that all animals followed the same pattern of embryonic development. A chick embryo early in development looks like a fish, complete with fins, gills, and a fishy tail. Then it resembles a reptile, and finally looks like a chick. Likewise, a human embryo resembles a fish, then a reptile and finally a human.
ref: ef: https://www.brighthubeducation.com/science-homework-help/8067-ontogeny-recapitulates-phylogeny-ernst-haeckels-theory/
Human embryo at 4 weeks
zebra fish embryo
Kangaroo embryo in pouch*
©2016, WebMD, LLC. All rights reserved
Three different species, and yet the phases they go through during embryogenesis look very similar. Here we have 2 mammals, one is a monotreme (kangaroo) and a fish! All vertebrates; very different when fully developed, yet embryologically similar
* photographer is Ederic Slater via https://www.scienceimage.csiro.au/image/2059/a-fifty-day-old-kangaroo-in-pouch/2
Human embryo at 8weeks