This table shows four different phenotypes with the following fractional ratios: There are nine different genotypes in the table: You can easily calculate the number of different phenotypes and genotypes in a dihybrid cross using the following formulae:
Students work in pairs. Start with monohybrid cross; obtain a corncob labeled A. Label Punnett squares as a null hypotheses number one and number two.
The possible crosses and the results are shown in the two images below. Null Hypothesis number 1 Look at your Punnett square and record information about the F2 generation.
P,p,p,p 2 List the genotypes of the F2: Pp,Pp,pp,pp 3 List the phenotypes of the F2: P, p, p, p 2 List the genotypes of the F2: Pp, pp 3 List the phenotypes of the F2: Count kernels of the corn on your cob. The hypothesis predicts that we will get certain results from the experiment.
But if, in fact, we et these results, is it possible that the results are due to the chance, rather than that the hypothesis is correct? This is possible, so we use a statistical test called Chi Square, x2to let us know the likelihood that our results were due to chance, rather than the hypothesis being correct.
When you see this symbol, you add the values that follow. Use the data found by counting the kernels and calculate the chi-squared value. Do you agree with the proportions that were expected after completing the chi-squared test? The correct value is 1.
This photo of an ear of "corncob B" illustrates the F2 generation from a dihybrid cross, showing the four different genes and grain types. In the photo, there are four grain phenotypes in the ear of genetic corn: The Law of Independent Assortment is easily demonstrated using an F2 cross second generation using F1 x F1 in which the original parents P1 used for making the F1 is differed in two traits.
Draw the punnet squares for the P1xP1 cross and the F1xF1 cross. Look at your Punnett squares for F1 x F1 and record information about the F2 generation. What is your predicted Null hypothesis for the genotype of the F1 parents? Count the kernels on the cob and record the results.
Dihybrid Corn C Now you will begin another dihybrid cross; obtain a corncob labeled C. Corncob C shows four different genes and grain types. There are four grain phenotypes in the ear of genetic corn: Look over the ear of corn and think of the possible null hypothesis ratio which explains the phenotypic characteristics of corn C.
The original P1 was purple, smooth and the other P1 yellow, wrinkled. Draw a punnet square to predict a possible F1xF1 cross. Then predict the F1xF1 cross.
Look at your Punnett squares for F1 x F1 cross. What is the predicted Null hypothesis for the F1 parents? PpSs x ppss Based on the F1xF1 cross Powered by Create your own unique website with customizable templates.This is an archive page for benjaminpohle.com, it is no longer maintained.
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View Lab Report - Mendel's Law of Genetics LAB REPORT from BIO L at Claflin University. ABSTRACT The objective of this experiment was to study the Mendelian laws of genetics as they applied from the chi square table will occur 20 of the time due to random chance Claflin University Corn Lab Report.
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Corn genetics - so many baby corns! As a preview to the future unit on plant reproduction, note that corn make two distint types of flowers - one male (seen by the tassels) and one female (seen by the silks).
Jaloliddin Nuriddinov Bio Genetics Lab TA: Taufiqul Huque 2/17/ Dominant and recessive epistasis in corn ears CG and CG Linkage of A & Sh genes on the corn ear CG Objective: The experiment is being done in order to see the actual proof of theoretical epistatic ratios of F 2 offspring%(9).