Gregor Mendel Character Traits

Originally it was believed that all traits are blended together. Due to the work of Gregor Mendel, though, it was shown that characteristics are a result of inherited factors, known as genes1. Genes are units of heredity on a chromosome that bring about our existence and create diversity. This diversity arises from the fact that there are different forms of genes known as alleles. All the alleles of an organism are referred to as that organism’s genotype and results in an organism’s phenotype, or physical appearance (ie. Widow’s peaks are a human phenotype that results from the genotype ww)2. To study inheritance of genes, Mendel used a punnett square to preform monohybrid crosses in which one character trait (i.e. eye color) is studied and dihybrid crosses in which two traits (i.e. eye color and height) are studied1. Some traits are sex-linked, meaning the gene for that trait occurs on one of the sex chromosomes. The X chromosome is larger than Y and carries more genes, thus most sex-linked inheritance results from the inheritance of a disease on the X chromosomes1. Since males only receive one X from the mother, if she contains a sex linked characteristic it is likely her sons will too. However, since daughters also …show more content…
Data will be collected and analyzed from P, F1 and F2 generations for cross A and the P and F1 generations of cross B. I hypothesize that for cross A the F1 generation phenotypic ratio will be 100% red eye & ebony body and the genotypic ratio will be 100% WwEe. For Cross A F2 generation, I predict the phenotypic ratio will be 9 redeye & non-ebonybody:3 redeye & ebonybody:3 whiteeye & non-ebonybody:1 whiteeye & ebonybody. For cross B, F1 generation I predict 100% of females will contain bar eyes (XBXb) and 100% of males will contain round eyes