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 Three purposes: 1. To predict the genetic frequency off offspring. 2. To predict the outcomes of genetic crosses using punnett squares. 3. Statistically analyze the results of a genetic cross. Hypothesis: 1. Monohybrid cross—Predict that 75% …show more content…
Results as follows: Data Table 4: Corn kernel data. | | Number of Kernels | Kernel Percentage(Divide count by total, thenmultiply by 100) | Kernel Coloration | | | Purple | 152 | 71.7% | Yellow | 60 | 28.3% | Total | 212 | 100% | | Kernel Texture | | | Smooth | 178 | 84.4% | Wrinkled | 33 | 15.6% | Total | 211 | 100% | Data Table 5: Punnet square for dihybrid cross. Parent Gametes PS Ps pS ps Parent PS PPSS PPSs PpSS PsSs Gametes Ps PPSs PPss PpSs Ppss pS PpSS PpSs ppSS ppSs ps PpSs Ppss ppSs ppss 9 different genotypes in the table. PPSS(1) PPSs(2) PpSS(2) PpSs(4) PPss(1) Ppss(2) ppSS(1) ppSs(2) ppss(1) Number of phenotypes =4 Number of genotypes =9 Data Table 6: Data from corn kernels. | | Number Counted | Ratio: Number counted /total | Purple and smooth | 112 | 53% | Purple and wrinkled | 40 | 19% | Yellow and smooth | 40 | 19% | Yellow and wrinkled | 20 | 9% | TOTAL | 212 | 100% | Exercise 1: Observing a Monohybrid Cross Questions A. What are the predicted ratios of
Please answer these questions then place them in the drop box for this lab. Use Microsoft word if possible.
This experiment, which was used to explore the Theory of Evolution created by Charles Darwin. The use of natural selection was apparent in the artificial modification of an organism's traits which aided in this investigation. Through this experiment the Wisconsin Fast Plant was used. It is a fast-growing organism developed to improve the resistance to disease in cruciferous plants. This plant aids scientist in the exploration of environmental effects on population due to the speed to which is matures and reproduces. Artificial selection was stimulated by the selection against plants with few hairs(trichomes). Trichomes create a wider variation which means it is polygenic. The plants that had only a few trichomes were
Suppose the feather color of a bird is controlled by two alleles, D and d. The D allele results in dark feathers, while the d allele results in lighter feathers.
The “Brassica rapa” is a fast plant known as the field mustard. This plant is well known for its rapid growing rate, which makes it an easy breeding cycle and easy to pollinate. In giving so this makes “Brassica rapa” a great participant for testing Gregor Mendel’s theories of inheritance. The “Brassica rapa” acts like a test subject in testing cross-pollination giving the understanding to the dominant allele of colored stems. There are different colors that are visible on the stem that are above the soil; the colors vary from green to purple. P1 seed was ordered, germinated and cross-pollinated until germination of the next off spring of plants were also done. It was
Round seeds (R) are dominant to wrinkled seeds (r), and yellow seeds (Y) are dominant
Gregor Mendel theorized that certain combinations of alleles in a genotype would result in a specific ratio of phenotypes expressed in each generation. For example, in the case of the dominant heterozygous anthocyanin genotype, the P1 with (ANL/anl) crossed with the P2 (ANL/anl) would result in a 1:2:1 ratio for genotypes (ANL/ANL), (ANL/anl) and (anl/anl). However,
Imagine that you are crossing two plants that are heterozygous for flower color and seed shape. The dominant and recessive alleles for these traits are:
Initially, the rock salt partially dissolved in the drops of water. After several minutes, the salt was more dissolved, but had not completely dissolved. There were very fine grains of salt that were visible at the base of the water bubble that hadn’t dissolved.
Gathering Data on the Different Traits of the Garden Pea (Pisum Sativum), Organizing the Dominant/Recessive Phenotypes of 60 F2 Offspring and Determining Whether the Null Hypothesis is Rejected or Accepted Using the Chi-Square Test.
A highly conserved gene will be used to identify a prokaryotic species isolated from the body. Fundamental lab techniques will be also explored and utilized, such as amplifying using PCR, cloning, and transforming the gene into a host cell. DNA electrophoresis and specific substrate plating will serve as analysis check points. The final product will be sequenced and compared to similar species to observe phylogenetic relationships.
This table helps show all the possible genotypes from one set of parents. The table shows that the genotypes purple and starchy are dominant, and the genotypes yellow and sweet are recessive.(stallsmith)
The two alleles, one contributed by the male and the one by the female gamete remain distinct; alleles do not blend with one another or become altered in any other way
My objective as a plant breeder is to improve the quality and sustainability (both environmental and economic) of life on Earth by developing plants that fit better into the natural world and produce more with less. This is not a task that any individual can undertake alone or that will ever be finished, as new challenges and opportunities constantly arise. Towards my objective I work with partners with diverse skill sets, interests, and backgrounds. Among my most important partners, leading to some of my most significant and longest lasting impacts, are students, whom I learn from and also teach.
The ability to directly modify living organisms is a novel human technology. Since the discovery of the DNA molecule the field of genetics has grown at an astounding rate. We now have the ability to alter organisms to fit our needs. This prospect offers the possibility of solving problems that have plagued humanity for thousands of years. In recent years genetically modified organisms have found many practical applications, particularly in the agricultural sector. Genetically modified organisms in this area, called transgenic crops (TC) are already being implemented on a considerably large scale. The possible benefits of utilizing TC has caused us avoid addressing important moral and ethical issues;
A few years back, the idea of utilizing Agrobacterium tumefaciens as a vector to make transgenic plants was seen as a prospect and a "wish." Today, numerous agronomically and horticulturally vital species are routinely changed utilizing this bacterium, and the rundown of species that is defenseless to Agrobacterium interceded change appears to develop day by day.