The research team found that identical twins who
are reared apart had the same chance of being similar as twins who were raised together
. Bouchard and his colleagues concluded that genetic factors have a large influence on behavioral habits demonstrating the influence of the genetics on development.
What was the main finding of the Minnesota study of twins reared apart?
Minnesota Study of Twins Reared Apart
He found that
an identical twin reared away from his or her co-twin seems to have about an equal chance of being similar to the co-twin in
terms of personality, interests, and attitudes as one who has been reared with his or her co-twin.
What are some of the important findings of twin studies?
Through studying twin pairs we identified
the first gene that influences both mammographic density (the amount of white areas on a mammogram) and risk of breast cancer
, called LSP1. His team found monozygotic (identical) twins were highly similar for mammographic density, which predicts future risk of breast cancer.
What was the aim of the Minnesota Twin Study?
The Minnesota Twin Study of Adult Development began in 1986
to identify what causes individual differences in aging
. Study of identical (MZ) and fraternal (DZ) twins allows for estimation of how genes and environment affect the aging process.
What did the study of twins raised separately indicate?
Environment affected personality
when twins were raised apart, but not when they were raised together, the study suggested. … The Minnesota researchers found that about 70 percent of IQ variation across the twin population was due to genetic differences among people, and 30 percent was due to environmental differences.
What was the primary finding of Minnesota study of twins reared apart quizlet?
What was the primary finding of the Minnesota Study of Twins Reared Apart?
Identical twins, whether raised together or apart, have very similar personalities
. You just studied 37 terms!
What does reared apart mean?
Identical twins reared apart constitute
two individuals with the same genetic constitution (genotype) reared in two different environments
. The study of a series of such twins allows us to estimate the influence of genetic and environmental factors on measured characteristics (phenotypes) of the twins.
What are the limitations of twin studies?
Limitations of twin studies
Results from twin studies
cannot be directly generalized to the general population
, due to lack of randomization; in addition, they are different with regard to their developmental environment, as two fetuses growing simultaneously.
Why are twin studies unethical?
The study, which has since been criticized for being unethical — for example, neither the children's biological parents nor the adopting families were informed — was an attempt to get at the central psychological questions of “nature versus nurture” and the “twinning reaction.”
Which of the following is a limitation of twin studies?
Which of the following is a limitation of twin studies?
The samples are not representative
. (Twins lead a very different life than the average child growing up. Therefore, they are not highly representative.
How does genetics and environment influence the similarities and differences within twins?
Any differences between identical twins is expected to be due to environmental factors since
they are genetically identical
, whereas fraternal twins only share half of their genes on average. … When a genetic influence is dominant, the identical twins would have more trait similarity than fraternal twins.
Who are the Jim twins?
Jim Lewis and Jim Springer
were identical twins raised apart from the age of 4 weeks.
What makes an egg split into twins?
To form identical or monozygotic twins,
one fertilised egg (ovum) splits
and develops into two babies with exactly the same genetic information. To form fraternal or dizygotic twins, two eggs (ova) are fertilised by two sperm and produce two genetically unique children.
What are two conclusions of Bouchard's study?
The research team found that
identical twins who are reared apart had the same chance of being similar as twins who were raised together
. Bouchard and his colleagues concluded that genetic factors have a large influence on behavioral habits demonstrating the influence of the genetics on development.
Why are studies of identical twins raised in different environments extremely valuable?
Why are studies of identical twins raised in different environments extremely valuable in understanding the causes of a disease? They are extremely valuable in understanding the causes of a disease, because it
differentiates
between nature vs. nurture.
What do twin studies tell us about behavior?
Twin studies are studies conducted on identical or fraternal twins. They
aim to reveal the importance of environmental and genetic influences for traits, phenotypes, and disorders
. Twin research is considered a key tool in behavioral genetics and in content fields, from biology to psychology.
