Genetics Lab Report

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Genetics play a major role in who we are and what we become. All of our genes are inherited from our parents, and each gene will generally have two copies of that specific gene, one from each parent. We call each copy of these genes alleles. These alleles are lotus on the chromosome, with one allele from one parent, and one from the other. If both alleles are identical, they form a homologous pair, if they are different, they form a heterozygous pair. There are many different mechanisms of inheritance, involving a number of alleles. Incomplete and codominance are two different patterns of inheritance.
Incomplete dominance occurs when two alleles for a gene are not fully expressed, meaning the gene is not one or the other. Instead, a
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Observe these F2 plants after seven days of life by counting the number of tall and short F2 plants. Remember: “Tall” plants are considered tall if they measure 2.5 centimeters or higher when measured at day 7. Record results in Figure 2, Document the finding of other groups in the same chart.
Calculate the ratio of tall plants to short plants. Interpret by using the the Chi-square table and refer to your lab manual to determine the significance.

Figure 1:
P1, P2, and F1 plants:
Day one:
No growth
Day seven:
After one week, all plants have grown and sprouted leaves, and P1, P2, and F1 plants look identical except for their height. All F1 plants are tall.
Day fourteen:
All plants have grown taller, and have begun to flower.
Day twenty one:
The number of flowers on the plants has increased. All plants have grown slightly in height, and have a few extra leaves, some are turning slightly yellow.
Day twenty eight:
Plants have turned a brown-yellow, appear dry and withered.

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We did this by crossing a true breeding short plant with a true breeding tall plant to create an F1 generation. For a genetic trait to follow the Mendelian pattern of inheritance, the entire F1 generation would be present only the dominant trait. In this case, the tall plants were dominant, and all F1 plants presented this trait. The height of all the plants in the F1 generation being dominantly tall gave evidence that the height of these plants followed the Mendelian pattern of
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