Twin study

on a question that has been puzzling individuals for centuries, "How does Genetics and the Environment affect intelligence?" After a study done between adopted children, identical and fraternal twins by Jack S. Kaplan, a Professor at Quinnipiac University, he determines environmental factors are as influential as genetics in children. Intelligence quotients in twins are quite similar which proves heredity influences intelligence, while the environment factor has been know to show increase in…

Biological and Neurological Causes and Treatments of Alcoholism Shawna Anderson Southwestern College Professional Studies Abstract Alcoholism is very common in the United States and affects nearly 20% of the United States population. Alcoholism ranges from a variety of dependences related to biological and neurological functions. These dependences can affect one physically, psychologically or emotionally and can come from a combination of biological and environmental influences. Alcoholism…

Twin studies have been an important element in scientific research considering the distinct genetic likeness between identical twins (Dovey, D., 2015). Identical (monozygotic) twins have the same heredity due to the fertilization of one egg by a single sperm, and fraternal (dizygotic) twins develop separately from two ova fertilized by separate sperms, hence with different heredities (Holzinger, K. J., 1929). Even though researchers have recently concluded a combination of genetics and…

There are a wide range of explanations for schizophrenia (SZ), ranging from genetics to psychodynamic approaches. These theories can be grouped into two categories; biological and psychological. These two explanations have many differences such as their fundamental basis, treatments and methodology, but also have several similarities. This essay will outline, then compare and contrast various theories within the biological and psychological explanations. One aspect of the psychological…

Is the way people are born like the Genetics of a child. Studies show that twins can look alike and others may be twins but not look alike at all and one twin can be mental and the other may have a 50% chance of developing conditions like bipolar and major depression. Example: Twins sisters that laugh and look the same because they are twins. But raised in different towns and aren't the same height. They can also read eachothers minds and Nature is the way you may act and like nurture is on…

I am an identical twin. Whether I am in school or at the supermarket, I always notice the creepy stares as well as the following: “Who’s older? Which one are you? Do you like being a twin? Am I seeing double?” How does one go about answering questions such as these? I’ve always had an identical twin, an exact copy of my genetic make-up, and people have never ceased to be amazed by this. I have trained myself to answer these questions and yes, I love being a twin. I always have a friend by my…

personality, they were astounded by the similarity in identical twins who shared the same beliefs on issues regarding religion and other social outlooks. Since identical twins raised apart would have the same genes but different environmental experiences they were able to link those traits back to genetics. When the separated twins were brought back together “80 percent of those surveyed reported feeling closer and more familiar with their twin than they did to their best friends” (Lewis). This…

The “gay gene” is a gene that codes for homosexual preference. Dean Hamer, scientist emeritus at the National Institutes of Health, published a study in 1993 hypothesizing that a region of the X chromosome might play a role in a man’s sexuality, the Xq28 gene. With this information he began an experiment 20 years ago studying 38 homosexual brothers and that’s when he confirmed the existence of the…

What are the general findings of identical twins separated at birth? Identical twins separated at birth are not only in looks, they similar in behaviors throughout life, good or bad grades, use or non-use of alcohol, use or nonuse of illegal drugs, and type of family they get as adults. The text states that studies "clearly show that MZ (monozygotic) twins were far more similar in the traits of criminality." (Schram, & Tibbetts, 2014, p. 112) What implications do these findings have for the…

remains a controversy in the book as well. Another topic introduced by the book and by the assigned textbook involves the implementation of twin studies in genetics. It is made clear in both outlets of information that these examinations are the best way to test genetics, since identical twins share a hundred percent of their genetic characteristics, while fraternal twins only share a fifty percent of their genetic characteristics. Anther topic, which appeared to be in both texts, was the…