We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Chi Square Equation Using Beans Essay Sample

The whole doc is available only for registered users OPEN DOC

Get Full Essay

Get access to this section to get all the help you need with your essay and educational goals.

Get Access

Chi Square Equation Using Beans Essay Sample

Introduction: Chi square is a mathematical comparison of data obtained and data expected using the rules of probability. A null hypothesis is the assumption that the expected (E) value will be equal to the obtained (O) value. An alternative hypothesis is a reason for any differences. The chi square equation is as follows:

In this experiment, 25 red/brown beans and 25 white beans will be mixed in each partner’s plastic cup. Then, one bean will be drawn from each cup and the colors will be recorded. This will be repeated 24 more times, each time the color is to be recorded.

Null Hypothesis: A 1:2:1 ration is expected. Any difference is due to chance.

Alternative Hypothesis: Variation in bean size caused larger white beans to be picked more.

Data Collection/Processing:

Genotype: 1:2:1 Homozygous dominant: heterozygous dominant: homozygous recessive.

Phenotype: 75% red 25% white


This experiment ended in the null hypothesis being accepted. In our group, two homozygous dominant alleles beans were picked, 10 heterozygous dominant were picked, and 8 homozygous recessive were picked. This made the chi square value 3.6, while the table value is 5.99, making it possible to accept the null hypothesis. The class groups averaged about 4.4 homozygous dominant, 10 heterozygous dominant and 5.6 homozygous recessive, making the chi square value 0.0104, which is much less than the table value, 5.99, also making it possible to accept the null hypothesis.

Some sources of error can be found. The beans were different sizes, possibly changing the color of bean that was picked, making more white ones appear. Other groups in the class used red and brown beans, which are hard to tell the difference between, and they may have accidentally recorded the wrong colors, altering the values. Also, some people may have peeked into the cup, allowing them to choose which ever bean they wished.

Some steps to make this experiment more accurate may be taken. The beans could have been more even in size, lowering the error that occurred. Different color beans should have been used, which would lower the accidental incorrect recordings. Also, the students should be closely monitored so they will not peek.

We can write a custom essay

According to Your Specific Requirements

Order an essay

You May Also Find These Documents Helpful

Designing an Osmotic Potential Experiment with Potatoes

Osmosis is used throughout the kitchen in various countries. In France, aubergines and cucumbers are often soaked in salt to create a nicer texture, however chefs lack understanding of why this happens, as they would have forgotten about it after they finished school, they only know that it happens. Therefore, this experiment is designed to explain to the millions of chefs around the world why...

Investigating the Effects of Salt on Seed...

PROBLEM/RESEARCH QUESTION In this investigation, we are researching and investigating whether the concentration/percentage of NaCl (salt) in water affects the germination rate of seeds and if so, which concentration germinates the most seeds. We will formulate our research by conducting an experiment in which we will observe the germination of seeds in various concentrations of salt water and evaluate the results gathered. In particular, we...

Investigating the Effect of Sodium Fluoride on...

Graph Showing the effect different volumes of Sodium Fluoride has on the average rate of production of H+ ions as measured by the colour change of resazurine Comment on Graph: The graph depicts a positive trend, as the amount of Sodium Fluoride increases the average rate of H+ ions as measured by the colour change of resazurine also increases. This increase is consistent with each...

Effect of Salinity on Germination

Colour used to indicate the raw data used to calculate example mean Colour used to indicate the raw data used to calculate example standard deviation Raw Data table 2 showing the effect changing the salinity of water added to ten ungerminated Vigna radiate (mung bean) seeds has on the seeds ability to successfully germinate as determined by the visible presence of a radicle seven days...

To Investigate the Effect of Regular Mowing...

T Test A T Test has been conducted to determine whether there is a marked difference in the heights of white clover petioles in mown and unmown areas, Null hypothesis: there is no significant statistical difference between the heights of petioles of white clover in unmown and mown areas. Alternative hypothesis: there is a significant statistical difference between the heights of petioles of white clover...

Get Access To The Full Essay
Materials Daily
100,000+ Subjects
2000+ Topics
Free Plagiarism
All Materials
are Cataloged Well

Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email.

By clicking "SEND", you agree to our terms of service and privacy policy. We'll occasionally send you account related and promo emails.
Sorry, but only registered users have full access

How about getting this access

Become a member

Your Answer Is Very Helpful For Us
Thank You A Lot!


Emma Taylor


Hi there!
Would you like to get such a paper?
How about getting a customized one?

Can't find What you were Looking for?

Get access to our huge, continuously updated knowledge base

The next update will be in:
14 : 59 : 59
Become a Member