Topic > A study on monohybrid maize breeding

IndexIntroductionMaterials and methodsThe materials used during the experiment are as follows:DiscussionConclusionIntroductionThe Mendelian inheritance model was discovered by Gregor Mendel, the "father of genetics". His experiment observed various patterns of genetic separation when combined with certain traits. He conducted his experiment with peas and was able to find the probability of a trait reappearing in future generations. The three principles founded by Mendel were the principle of dominance and excessiveness, the principle of segregation and the principle of independent assortment. His theory leads to the understanding of genetic variation, that is, differences between individuals or even large-scale populations, often influenced by mutations and sexual reproduction. The observations we can see about an individual that make him unique are described as his phenotype or physical characteristics. Meanwhile, a person's genotype cannot be directly observed but instead constitutes genetic information. When an organism is found to have the same alleles, it is called homozygous. If the organism has different alleles, it is classified as heterozygous where the dominant allele is expressed rather than the recessive trait. Punnet squares are used to find the probability that an organism has the same alleles as its parents. The dominant homozygote, similar to the homozygote, has the same copy of the same gene; however, a heterozygous dominant gene consists of two different traits. Certain phenotypes such as having black hair are more common in some populations because the gene pool of those individuals has a higher probability of producing certain phenotypes. The color variation in corn is due to the kernels having dominant genes and are taken by natural selection. In the laboratory we discussed the study of two monohybrid crosses: a cross of purple starch with yellow starch. During a monohybrid cross of two heterozygous purple corn plants, the resulting phenotypes occur in a 3:1 ratio. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an Original Essay Materials and Methods The materials used during the experiment are as follows: An ear of purple and yellow corn starch A blue marker A pen to record the data While working in groups of two, one person counted the number of kernels on the corn while the other recorded the data. We started with one column of beans and counted vertically until we had a total of sixteen columns. Each grain was marked with a blue marker so that a recount of the same row would not occur. After recording the data, we used chi-square to determine whether the numbers obtained corresponded to an expected ratio of the genetic cross. The probability used to determine whether the observed results were significantly different from the expected results is as follows: The expected number of purple kernels should be determined by multiplying the observed total by 0.75. To determine the number of expected yellow kernels, the observed total must be multiplied by 0.25. The observed value for purple starch was 3.6:1. Higher than expected value would have been 3:1. Discussion The hypothesis stated that during a monohybrid cross of two heterozygous purple corn plants, the resulting phenotypes occur in a 3:1 ratio. This hypothesis was well supported by the ratios between groups and classes, but equal to 3.6:1. The ear of corn we observed was a dominant heterozygous phenotype because the purple corn was the dominant trait compared to the yellow starchy color which would be considered recessive. The group data compared with the data of the.