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We chose explanation 2 which states that some environmental factors do not have an impact on the genotype but on the phenotype instead. From the data we collected in our experiment we can conclude that this is true, however it is not only the light intensity that effects the phenotype. 2 out of our 4 petri dishes were put into a drawer with no light and 1 into a dark room which received light periodically. Out of the 50 seeds in the drawer 21 grew to be white while the rest didnt grow at all. In the dark room there was one white little sprout. With a logical inference you would infer that the drawer wouldnt grow but it was the other way around. This proves that light intensity definitely plays a role but water does as well. The other 2 petri dishes were placed in florescent light and by the window which was the control. The dish under the light had to be given more water (about 2mL) throughout the experiment so it would grow because without it, the light would take it up. So in conclusion the environmental factors influence the phenotype by having the light intensity determine how much water a plant needs.

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0:1
Green to White

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0:21
green:white

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12:8
green:white

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26:3
Green to white

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-4 petri dishes
-Filter paper
-Bottle with distilled water
-200 tobacco seeds
-Fluorescent light

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1. Read safety concerns and gather the materials needed for the lab procedure.
2. Divide the 200 seeds equally among the four petri dishes.
3. Place the tobacco seeds on filter paper and fill the each petri dish with one milliliter of water.
4. Place one petri dish under a fluorescent light, one in the sunlight, one in a dark room, and one in a lab table drawer.
5. Record the growth of the seeds.

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2 petri dishes
Filter paper
Bottle with distilled water
200 Tobacco seeds

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Growth
Genotypes
Phenotype

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We are trying to verify explanation 2: Some environmental factors, such as the amount or the intensity of light, have no influence on the genotype of tobacco plants, but these factors can alter the phenotype of a tobacco plant as is grows.

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Type of seeds
Amount of seeds
Amount of water
Same setting
Same amount of time

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-Be careful to not spill the tobacco seeds.
-Wear lab apron and safety goggles.
-No horseplay in the lab.

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Intensity of the Light

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Claim-which explanation does your group hope to verify?
Punnett square for the original cross.
Method..safety concerns, identify controls and independant and dependant variables, procedures.
Evidence from the experiment
Justify your results

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Genotype:
1GG : 2Gg : 1gg
Phenotype:
3 Green : 1 White

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Gg X Gg
G       g
G GG Gg
g Gg gg

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Can the environment influence the genotype or the phenotype of an organism such as a tobacco plant?