Abstract
According to Mendel¡¦s Law of Segregation, phenotypic ratios may be influenced by dominance of one allele compared to another. When an organism produces its gametes by meiosis, the alleles separate. This is Mendel¡¦s First Law-the Law of Segregation. This experiment investigated the effects of complete and incomplete dominance on the behavior of two different genes for chlorophyll production in tobacco. Two sets of approximately 50-100 tobacco seeds were planted for one week. The plants were the F2 result of two sets of monohybrid F1 crosses Gg x Gg and CyCg x CyCg. A chromosome for these plants has two sets of genes. The gene at one locus has two alleles that code for normal chlorophyll production. Dominant allele represented as G produce the green phenotype. The mutant allele, g, produces no chlorophyll producing an albino phenotype. Therefore genotypes GG and Gg phenotypically are green. When mutant allele g is homozygous for it, gg, no chlorophyll is present......
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Approximate Word Count: 2909
Approximate Pages: 12 (260 words per double-spaced page) |