Dna Inheritance

In: Science

Submitted By joelwould1
Words 412
Pages 2
DNA Inheritance
Joel Klingensmith
Due Date: 10/12/2015
University of Phoenix

Not all phenotypes can be seen. Blood types can only be observed by laboratory techniques. The ability to roll your tongue are phenotype variables. As humans, our shape, size, hair color, eye color, height and so on; are all about phenotype variables. I am able to recognize my family tree of all different phenotype variables, could be passed through genes or caused by environmental factors. Influencing body weight can be directed by genes or by diet, which is the environmental factor. Genotypes are the makeup of the cell where it leads next to the personal expressions, and characteristics; or better known as phenotypes. The blue eyes that are shown in my family tree, more occurring than the brown eyes, is a part of the characteristics. The blonde hair that my grandmother had is the phenotype, or my older brother being left handed is a phenotype. My grandfather’s baby blue eyes would be a trait I would pick out of the three generations. Choosing my grandfather’s blue eyes, I would make a hypothesis using the Punnett square. My grandfather’s parents would have each their own allele, either dominant or recessive. Each square in the Punnett square have a 25 percent chance. If my grandpa’s father had brown eyes, his alleles would be “Bb” for dominant and recessive, or two different alleles. If my grandfather’s mother had blue eyes, the genotypes would be “bb”. Taking those two down, the probability of the offspring would have a 50 percent chance of having brown eyes and blue eyes. My grandfather’s blue eyes, I would predict has a genotype of “BB” for dominant.
Using the scientific method, I would state my problem in the form of a question; I would ask “why does my grandfather have blue eyes?” After knowing what I am after, I would do my background research. Seeing that…...

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