Planaria Regeneration and Development
Lab 5
Name: Dominic Siaw TA: Marian Wahl Date Performed: 3/31/15
Date Submitted: 4/14/15
Abstract
The purposes of this experiment are to become familiar with the anatomy and behavior of Planaria and make a design to test which aspect of diffusion gradient model which will cause development. The body parts of planaria was observed under a microscope. The flatworms were cut into 3 parts equally based on the gradient model . After a week, the new body parts were observed to have regenerated into new species. The hypothesis was rejected because the results did not match the hypothesis
Introduction
Planarians are freshwater flatworms that are usually found in …show more content…
The hypothesis will be tested during the experiment. Students will create a gradient model. On the basis of the gradient model, the experiment will be done. The hypothesis of my group was that, if we cut the planaria into three parts equally, it will grow three identical planarians because the chemical substance of gradient will be enough for the worm to know where to grow the correct body parts. After the observations, students will realise whether to accept or reject the hypothesis.
A diffusion gradient model was created in this experiment. Development is established by a gradient of chemical substance (morphogen). Cells sense morphogen. In this experiment, our gradient model was created based on our hypothesis that is if a planaria is cut into three equal parts it will regenerate and grow new parts. The flatworm was cut horizontally into three equal parts. Starting from the head to the tail. The morphogen characterized in the wounds will cause regeneration. (McMillan 36). The diffusion gradient model …show more content…
Type of experiment Day 1 of observation Day 2 of observation Day 3 Of observation
Control 1 5 5 6
Control 2 4 5 5
Dish A 2 3 3
Dish B 3 3 3
Dish C 3 4 4
Dish D 3 5 6
Dish E 3 4 4
On the second observation, the flatworms were now five. Some of the worms had regenerated and given birth to new ones
The timing of blastema formation from the results of observations and results of this experiment is approximately 5 days. That is, after 5 days the wounded cells form mass of cells. This cells regenerate into body parts and the flatworm becomes a whole. Cellular differentiation occurs in planaria by dedifferentiation. During the regenerative processes, cells move back to earlier their earlier stages. Differentiation in planaria occurs during the early stages of regeneration so about 1-3 days after the cut.
Cuts and
Lab 5
Name: Dominic Siaw TA: Marian Wahl Date Performed: 3/31/15
Date Submitted: 4/14/15
Abstract
The purposes of this experiment are to become familiar with the anatomy and behavior of Planaria and make a design to test which aspect of diffusion gradient model which will cause development. The body parts of planaria was observed under a microscope. The flatworms were cut into 3 parts equally based on the gradient model . After a week, the new body parts were observed to have regenerated into new species. The hypothesis was rejected because the results did not match the hypothesis
Introduction
Planarians are freshwater flatworms that are usually found in …show more content…
The hypothesis will be tested during the experiment. Students will create a gradient model. On the basis of the gradient model, the experiment will be done. The hypothesis of my group was that, if we cut the planaria into three parts equally, it will grow three identical planarians because the chemical substance of gradient will be enough for the worm to know where to grow the correct body parts. After the observations, students will realise whether to accept or reject the hypothesis.
A diffusion gradient model was created in this experiment. Development is established by a gradient of chemical substance (morphogen). Cells sense morphogen. In this experiment, our gradient model was created based on our hypothesis that is if a planaria is cut into three equal parts it will regenerate and grow new parts. The flatworm was cut horizontally into three equal parts. Starting from the head to the tail. The morphogen characterized in the wounds will cause regeneration. (McMillan 36). The diffusion gradient model …show more content…
Type of experiment Day 1 of observation Day 2 of observation Day 3 Of observation
Control 1 5 5 6
Control 2 4 5 5
Dish A 2 3 3
Dish B 3 3 3
Dish C 3 4 4
Dish D 3 5 6
Dish E 3 4 4
On the second observation, the flatworms were now five. Some of the worms had regenerated and given birth to new ones
The timing of blastema formation from the results of observations and results of this experiment is approximately 5 days. That is, after 5 days the wounded cells form mass of cells. This cells regenerate into body parts and the flatworm becomes a whole. Cellular differentiation occurs in planaria by dedifferentiation. During the regenerative processes, cells move back to earlier their earlier stages. Differentiation in planaria occurs during the early stages of regeneration so about 1-3 days after the cut.
Cuts and