Heredity Lab Report

Name

Institutional Affiliation

Heredity Lab Report

PurposeTo equip learners with fundamental knowledge on genetics IntroductionThe foundation of genetics was laid by Gregory Mendel who was later appreciated as the father of genetics. In his research, Mendel did several experiments using pea plant and compiled his report, which was recognized a century later. In his experiments, he did self-pollination and cross-pollination. He then observed varied trait like flower color, seed color, flower position, pod shape, pod color, stem length, and seed shape (Audesirk, Audesirk & Byers, 2008). Out of the experiments, Mendel formulated two laws, which are law of segregation and independent assortment.Hypothesis/Predicted OutcomeAll the offsprings will be purple MethodsTo obtain credible results, I will apply experiment method in the lab. During which, I will self-cross F1 generation of the previous pure lines parents. Afterwards, I will observe the phenotype outcome. In my report, I have chosen Pp to represent the self-crossed plants.

Results/Outcome

EGGS

SPERMS P P

P PP Pp

p Pp Pp

Discussion/AnalysisThe result of the experiment produced a phenotypically ratio of 3:1, that is, three purple flower plants and one white flower. This is not what I was expecting according to my hypothesis. The outcome was because the offsprings inherited a single gene from each parent to form their pair of gene (Audesirk, Audesirk & Byers, 2008). Because the gene of the purple plant suppresses the white plant in the off-springs, it is evident that three quarters of the off-spring become phenotypically purple, but genotypically they had gene of white and purple traits from both parents (Krogh, 2007). On the other hand, the white flowered off-spring contains pure traits. Therefore, P (upper case) is dominant p (Lower case) is recessive. In this regard, the genotypic ratio PP:Pp:pp is 1:2:1

References

Audesirk, T., Audesirk, G., & Byers, B. E. (2008). Biology: Life on Earth with physiology. Upper Saddle River, NJ: Prentice Hall.

Krogh, D. (2007). A Brief Guide to Biology with Physiology. Upper Saddle River, NJ: Prentice Hall