Discordance, in genetics typically means that a similar
trait is not shared between twin members
. Studies of twins have shown that genetic traits of monozygotic twins are fully concordant whereas in dizygotic twins, half of genetic traits are concordant, while the other half are discordant.
What is the definition of discordant twins quizlet?
Discordant.
The presence of a specific genetic trait in only one of a set of clones
(or identical twins). Fraternal Twins. Twins who develop from separate eggs. They are genetically no closer than brothers and sisters, but they share a fetal environment.
Which situation is most consistent with the results of twin studies of schizophrenia *?
nurturing. Which situation is most consistent with the results of twin studies of schizophrenia? a.
When both twins carry the gene for schizophrenia, only one will develop symptoms.
Which factor is most closely associated with the eventual onset of schizophrenia quizlet?
Which factor is most closely associated with the eventual onset of schizophrenia?
birth order
.
Why are monozygotic twins who are reared apart so useful in the calculation of heritability?
5.16 Why are monozygotic twins who are reared apart so useful in the calculation of heritability?
Heritability measures the amount a phenotype is caused strictly by gene than environmental factors
. … MZ twins share 100% of their genetic material. When they are reared apart they face different environmental conditions.
Why are twin studies important quizlet?
Twin studies are
almost the only way to separate out the effects of nurture and nature
, as twins share 100% of their genes so if it is due to nature they should both be affected by the characteristic. This makes it the most useful way to measure the involvement of genetics in disorders.
Why are twin studies valuable in behavioral genetics research quizlet?
Twin studies
allow researchers to examine the overall role of genes in the development of a trait or disorder
. … MZ twins are the same sex and share 100% of their genes. DZ twins can be the same- or opposite-sex and share, on average, 50% of their genes.
Can you have both did and schizophrenia?
There are a number of reasons why you might get DID and schizophrenia mixed up. For starters, research has shown a high co-occurrence between dissociative disorders and schizophrenia spectrum disorders:
Between 9% and 50% of people with schizophrenia also meet the criteria for
a dissociative disorder.
Are schizophrenia and split personality the same?
Myth No.
This isn’t the same as multiple personality disorder, or, more accurately, dissociative identity disorder (DID). A person with
schizophrenia doesn’t have two different personalities
. Instead, they have false ideas or have lost touch with reality. Multiple personality disorder is unrelated.
Is dissociation a symptom of schizophrenia?
Dissociation likely
plays a key role in schizophrenia
and borderline personality disorder (BPD), although empirical studies that compare specific manifestations of these symptoms in schizophrenia and BPD are rare.
Are identical twins more likely to get schizophrenia?
The researchers found that if one identical twin was affected by schizophrenia or schizophrenia spectrum disorders, the
chance of the second being affected was about a third
. For non-identical twins, the chance was far lower – only 7% for schizophrenia and 9% for schizophrenia spectrum disorders.
What is the biggest reason why cloning one’s personality will never be feasible quizlet?
What is the biggest reason that cloning will NEVER be feasible? Personality is
the result of a complex interaction between one’s genes and environment
. Much of the world is changing toward a setting where physical strength matters less and alternative child-care arrangements are possible.
What mental illness is genetic?
Scientists have long recognized that many psychiatric disorders tend to run in families, suggesting potential genetic roots. Such disorders include
autism
, attention deficit hyperactivity disorder (ADHD), bipolar disorder, major depression and schizophrenia.
What is co twin method?
The co-twin control method is
an elegant research design that uses differences within twin pairs to examine the association between a putative environmental risk factor and an outcome variable
. … Co-twin control studies can be used in both the experimental and observational settings.
What is the missing heritability problem of schizophrenia?
The “missing heritability” problem is the fact that
single genetic variations cannot account for much of the heritability of diseases, behaviors, and other phenotypes
.
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.
