Plant Genetics JANICE NALBONE Abstract This experiment is being done to show Mendel’s rule of dominance that says certain alleles are dominant and others are recessive. To show this‚ we are using tobacco seeds‚ a monohybrid cross comparing only one trait color. We are also showing Mendel’s law of segregation with a Dihybrid cross comparing two traits of color and texture. Introduction
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traits of its offspring? Aim: to establish whether characteristics produced from the offspring of a drosophila cross are recessive or dominant traits. Hypothesis: If certain phenotypes are expressed in the offspring from the cross of certain Drosophila‚ then the determination or justification of recessive or dominant phenotypes can be found. Theory review and justification of the hypothesis: Drosophila Melanogaster are simply now generally referred as the common term “fruit fly” or “vinegar fly”
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dominant or recessive. A dominant allele has a different phenotype than a recessive allele. Phenotypes are simply the observable traits seen in a living organism. An example of phenotype is a dominant allele for hair color is Brown‚ while the recessive allele for hair color is Blonde. They both are for the same gene‚ but are different outcomes of the gene. A dominant allele overrides a recessive allele. In order to have a recessive phenotype‚ two recessive alleles need to be given to the offspring
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Furthermore‚ Arabidopsis thaliana shares similar patterns of growth‚ development‚ flowering and seed production to higher plants. The high germination rate of this plant allows researchers to analyze large populations of seedlings for a specific phenotype. Besides all these characteristics‚ Arabidopsis thaliana is a small plant‚ requiring relatively little sunlight within temperatures of 22C to 26C. Thus Arabidopsis thaliana can be grown easily in the laboratory and also in abundant quantity (Masson
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There were multiple parts to this experiment that were introduced together. In the first part of the experiment‚ we used a cup and a coin with both a heads and tails side‚ shook the coin‚ and looked at the side in which the coin landed on. After conducting these tests 20 times‚ we recorded which side that the coin landed on each time. In our results‚ we saw that the coin landed on heads 11 times and it landed on the tails side 9 times. We originally hypothesized that it would be an even mix between
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Phenotypes are the representations of gene activity in an individual; they are the physical characteristics rather than the genetic makeup itself. Though phenotypes are determined by genetic code‚ they are not permanent; they can shift and change according to the different environments an individual experiences in their life. Environmental factors are an integral part in determining phenotype. The fairly new scientific field on this subject is known as epigenetics‚ and it “serves as a link between
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offspring: 46 - foul-smelling 44 - shrunken fruit‚ short height 8 - short height 8 - shrunken fruit 7 - foul-smelling‚ short height 6 - foul-smelling‚ shrunken fruit 3 - foul-smelling‚ shrunken fruit‚ short height 1 - normal phenotype Determine the genetic map for these traits‚ showing map distances. 2. Given the following three genes: Q -10 mu - P -30 mu - S You cross a homozygous dominant individual with a homozygous recessive individual‚ and obtain
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In humans‚ hair is commonly present on all the basal segments of the digits and invariably absent from all the terminal ones. On the middle segments‚ there is wide fluctuation with apparent familial and racial tendencies. Hair is present on the middle segment of the fingers more frequently than on the middle segment of the toes. Hair is most often found on the middle segment of the fourth finger. The presence of mid-digital hair in human beings is a trait that is determined genetically. It is the
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wrinkled Yellow and smooth Yellow and wrinkled TOTAL Exercise 1: Observing a Monohybrid Cross Questions A. What are the predicted ratios of the phenotypes in the plants? B. What was the total number of seeds that germinated? C. What are the actual ratios of the phenotypes displayed in the tobacco plants? D. Explain why it may be important to collect data from a larger population. E. If all yellow
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made. Two vials contained two male Wrinkled flies and two female black flies‚ and one vile with two male black flies and two female Wrinkled flies. The F1 generation survived in two of the three viles all yielding the wrinkled wings and black body phenotype. The F1 flies were then self-crossed into three separate viles yielding an F2 generation. Only the F2 viles from the original black male and wrinkled female parents survived. After the F2 flies hatched they were counted for twelve days. The experimental
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