VI) Discussion
After reviewing the completed data charts after the experiment, some of the results supported the original hypothesis, but there was also evidence from the experiment that supported the idea that the recessive gene can also be strong throughout generations, and somewhat refuting the claim. The frequency table showed that the thumb, earlobe, and hairline all have the dominant trait more frequent. The dominant form frequency for earlobe was 65%, for the thumb was 75%, and hairline had a 55% probability. These numbers are somewhat significant to the opposing recessive form. Which supports the hypothesis because if one or more dominant alleles are present, the probability of the phenotype showing the dominant form is greater. On …show more content…
Punnett squares 1, 3, and 4 all have a 100% probability for the dominant phenotype. Square 1 is 100% because all of the alleles are dominant. Also, punnett squares 3 and 4 have a 100% probability because they both have at least two dominant alleles in the proper allele cross to result in a dominant allele in every box. All of these boxes have a dominant gene, and even though there are recessive genes present, they do not show because of the dominant allele. In punnett square 2, there is 75% chance for the dominant traits. This is because on box in the square is homozygous recessive, meaning there is no dominant gene present to show, and is the only form that the recessive gene will show in the phenotype. Lastly, punnett square 5, has a 50% probability of receiving the dominant trait. On the other hand, for the recessive phenotype, punnett square 6 has a 100% chance. This is because all alleles present are recessive, and to show a dominant trait, there needs to be a dominant allele present. Furthermore, square 7 has a 50% chance of showing the recessive allele. That is because a dominant ia also present, which is the more authoritative allele. Lastly, punnett square 8 shows a 25% probability for the recessive trait. This is because there are 2 dominant alleles which overpower the recessive alleles. These punnett squares support the original hypothesis because when 1 or more dominant alleles are present, the probability of the recessive trait as the phenotype is