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Genetic testing and genetic screening is getting more advanced as new technology arrives This technology is both promising and encouraging in todays society The research that is being done today will help in the years to come by making the lives for the sick easier or possibly eliminating a disease altogether It shows us that we have the power to cure a disease by removing it so the disease never fully surfaces or keep it in remission for the remainder of the patients life However this thought is both exciting and frightening because it is still so unknown In this essay there will be discusses on how genes work the advantages and disadvantages of genetic testing example of genetic disorder and how ethical and morally right is it Genetics is the study of inheritance To understand the basic of genetic testing and genetic screening we will take a look at human characteristics that are passed down In the book Essentials of Anatomy and Physiology Valerie Scanlon and Tina Sanders state that each individual person has 46 chromosomes and each chromosome is made up of DNA and proteins There are two types of possibilities for how a gene may be expressed The alleles that are present in the genetic make-up are called genotype and the appearance of alleles is called phenotypes When genes have two or more alleles one may be dominant over the other which is called recessive When you have two alleles the same the person is said to be homozygous for the trait and when they are different the person is said to be heterozygous This all ties back to the combinations of genes in the egg and sperm from the parents to the children The example of the inheritance of eye color shows how genes are passed down Although many pairs of genes with many possible phenotypes determine eye color one pair is considered the principal pair Lets consider brown eyes dominant
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