(855) 4-ESSAYS

Type a new keyword(s) and press Enter to search

C-Fern Lab


             We made F1 diploid sporophytes by crossing a haploid green parent with a haploid pale parent. All of the F1 sporophytes were green; they had one allele for green and one for pale (green is dominant). Since the alleles separate independently, the diploid parents give one copy of the allele for color to one gametophyte and the other copy to another gametophyte. This is why we see some pale gametophytes and some green gametophytes. According to our hypothesis for Hybrid A and Hybrid B, after we allow random fertilization among the G2 population, we should have noticed more green plants than pale plants in the F2 sporophyte population. We induce fertilization among the plants by placing a small amount of water on the ager plates where the gametophytes were growing. This alloed the sperm to move freely around the plant and insured random fertilization.
             Materials and Methods.
             During week one we were given two-week-old cultures of G2 C-Fern gametophytes. The cultures were grown on agar plates marked A and B. The plates were maintained at 28o Celsius. The plates were also kept under 24 hour fluorescent light for two weeks. We counted the number of pale and green hermaphrodite gametophytes. In order to make counting easier we drew a grid on the plate, which kept us from double counting, and placed it under a dissecting scope. We only counted hermaphrodites because they are much larger and more easily; they are also the ones that go o n to produce the F2 generation. This created a standard so the class results could be compiled and the data would not be skewed. We compiled the class data to increase our sample size. An increased sample size helps us test our results against expected ratios more accurately. These numbers gave us an indication of how many green and pale sporophytes we would have once the gametophytes were given a chance to undergo fertilization. We placed 2 mL of sterile water on each of our agar plates to induce random fertilization among the haploid gametophytes.


Essays Related to C-Fern Lab

1. Lab Report on Density of Water

... equals their density. After the measurements are found then determine the precision of the results by calculating the percent error. The purpose of this lab is to determine the density of water, the density of an unknown liquid and the density of an unknown solid. DEFINITIONS Volume- how ... greatly. Small things like not concentrating and little things like that affects every outcome. The density of the unknown liquid that was determined in this lab was .6359 g/mL. The unknown liquid was proved to be methanol. The true density of the unknown liquid was .785 g/ mL. The ... that the soli...

  • Word Count: 1154
  • Approx Pages: 5
  • Grade Level: High School

2. Diffusion and Osmosis Lab

... of solutes is labeled as hypotonic. Two solutions that contain equal concentrations of solutes are known to be isotonic. Purpose The purpose of this lab was to experiment the effects multiple sucrose solutions have on the weight of shell-less chicken eggs in order to demonstrate the process of Osmosis. ... affected by different sucrose. Solutions. Ho: The weight of the deshelled eggs will not be affected by different sucrose. Solutions. Expectations For this lab I expected that the solutions with different amounts of sucrose would impact the weight of the naked eggs. I expected the eggs...

  • Word Count: 1725
  • Approx Pages: 7
  • Grade Level: High School

3. Science lab - Formula of a Hydrate

... , the moles of water can be found per one mole of anhydrous salt. An anhydrous salt is a hydrate that lost its water. Using various lab equipment such as burners, crucible, and balance, and techniques such as the mass-to-mole ratio and mass to percentage, the percentage of water in ... to be dry, yet when heated, surprisingly large quantities of water are driven off, because water is loosely bonded to the hydrate. Procedure 1. Set the necessary lab equipment properly. 2. Weigh dry and clean crucible and its cover on the balance. Record. 3. Measure about 1 to 2 grams of the hydrate and re...

  • Word Count: 667
  • Approx Pages: 3
  • Grade Level: High School

4. Experiment - AP Biology Osmosis Lab

... the other solution), hypotonic (lower solute concentration and a higher water potential than the other solution), and isotonic (equal water parts). Part I. Agar Lab Purpose: This lab is all about finding out if there is a correlation between "cell " size/surface area, and diffusion rates. Hypothesis: Cells with a larger ... to have different sized cubes to ensure that difference in diffusion could clearly be seen and compared. Part II. Dialysis Tubing Lab Purpose: In this lab, we will be conducting an experiment where we will observe the acts of passive transport: diffusion and osmosis. ...

  • Word Count: 2017
  • Approx Pages: 8
  • Grade Level: High School

5. Train Lab

Train Lab Problem- What's the acceleration of the L train? Materials- Measure meter, stop watches, L train Procedure- First, the person in charge examines the platform briefly. Then he takes 11 people and places ... s Total Velocity: 8.27 m/s Total Acceleration: .46 m/s 2 Observations: According to our research, the L train didn't seem to have a very high acceleration. Discussion: - Why did we omit certain intervals to make our lab as accurate as possible? - Certain intervals were omitted from this experiment in order to ensure that we were providing the most accurate ... could. Between som...

  • Word Count: 407
  • Approx Pages: 2
  • Grade Level: High School

6. Coulomb Balance Lab Report

... the procedures of our experiment. Specifically, we found the charge of the sphere to be 1.268x10-8C. Conclusions: In general, I felt that the lab that my colleague and I completed showed that the force between the charged spheres varied as I/r2. For the most part, our data and measurements coincide ... the belief that charges will redistribute in order to minimize the potential energy when they are moved close together. This phenomenon was demonstrated in the lab by the angle of separation between the spheres as it grew when they were moved closer together. In addition, our procedure mim...

  • Word Count: 1297
  • Approx Pages: 5
  • Grade Level: High School

7. Lab Report - Calorie Content of Food

Purpose The primary purpose of this lab was to analyze the calorie content of various foods to test. Different food types had different amount of calories within them. This experiment allowed me to analyze ... constructing a basic calorimeter. The different food types that I measured were a form of nut, a marshmallow, and a food of my choice which was a potato chip. Results Data Table 1 (Hands on Lab, 2016) Peanut Marshmallow Potato Mass of the Beaker (g) 51.9 51.9 51.9 Mass of the Water and Beaker Only (g) 101.9 101.9 101.9 Mass of the Water Only (g) 50.0 50.0 50.0 ... Data Table 2 (Hands ...

  • Word Count: 524
  • Approx Pages: 2
  • Grade Level: High School

8. Axels and Rotational Motion Lab

... uniform circular motion we will be able to calculate the rotational force acting on the bob and the counterforce being applied by the spring inward. This entire lab helpfully highlights many aspects of rotational motion in a simple clear cut layout. Apparatus Description The apparatus in image one utilizes an axle, multiple masses, a bearing ... able to collect all our data. For each different position of the marker we ran the rotational constant velocity five times as outlined by the lab. While collecting data we had a photogate set up over the top of the opposing mass bob to collect t...

  • Word Count: 719
  • Approx Pages: 3
  • Grade Level: High School

9. Lab Report - Movement of Stentors

... move and feed by the locomotion caused by cilia (Hickman, 2013). They are ectothermic, which means that the environment temperature determines their body temperature (Stentor, 2015). Our objective for this lab was to study the rate of movement of stentor in contrast with different water temperatures. Therefore, stentor was tested in 5° C water and 20° C water in order to study the effects ... the surrounding environment, the speed of stentor will increase as well because an increase in heat is directly related to an increase in energy. Materials and Methods To begin the lab we obtaine...

  • Word Count: 586
  • Approx Pages: 2
  • Has Bibliography
  • Grade Level: High School

Got a writing question? Ask our professional writer!
Submit My Question