Cai et al. (2015) questions with complete
solutions 2025.
aim - ANSWER: The aim of the research was to asses the possible link between
specific genetic sequences and Major Depressive Disorder (MDD)
sample - ANSWER: A sample size of 6000 experimental participants and 6000 controls
on the basis of evidence available when the study was designed of the likely existence
of genetic loci.
All control participants were either patients undergoing minor surgical procedures at
general hospitals (37%) or from local community centers (63%). All subjects were Han
Chinese women with four Han Chinese grandparents. Participants were excluded if they
had a pre-existing history of bipolar disorder, psychosis, or mental retardation.
All participants were also aged between 30 and 60 and had to watch more episodes of
MDD that met the DSM-IV criteria, with the first episode occurring between 14-50 years
of age. Participants were also excluded if they abused drugs or alcohol before their first
episode.
locus - ANSWER: A Locus in genetics is a fixed position on a chromosome.
Researchers believe that locating genetic loci will allow them to more accurately predict
whether certain genes influence certain behaviors
procedure - ANSWER: All subjects were interviewed using a computerized assessment
system. DNA was also extracted from saliva samples.
results - ANSWER: The results found that statistically, those participants that had
suffered from MDD had a similar genetic sequence, which could possibly allow us to
conclude that depression has a genetic origin.
conclusion - ANSWER: In conclusion, based on the results of the study, depression
may have a genetic and biological origin.
solutions 2025.
aim - ANSWER: The aim of the research was to asses the possible link between
specific genetic sequences and Major Depressive Disorder (MDD)
sample - ANSWER: A sample size of 6000 experimental participants and 6000 controls
on the basis of evidence available when the study was designed of the likely existence
of genetic loci.
All control participants were either patients undergoing minor surgical procedures at
general hospitals (37%) or from local community centers (63%). All subjects were Han
Chinese women with four Han Chinese grandparents. Participants were excluded if they
had a pre-existing history of bipolar disorder, psychosis, or mental retardation.
All participants were also aged between 30 and 60 and had to watch more episodes of
MDD that met the DSM-IV criteria, with the first episode occurring between 14-50 years
of age. Participants were also excluded if they abused drugs or alcohol before their first
episode.
locus - ANSWER: A Locus in genetics is a fixed position on a chromosome.
Researchers believe that locating genetic loci will allow them to more accurately predict
whether certain genes influence certain behaviors
procedure - ANSWER: All subjects were interviewed using a computerized assessment
system. DNA was also extracted from saliva samples.
results - ANSWER: The results found that statistically, those participants that had
suffered from MDD had a similar genetic sequence, which could possibly allow us to
conclude that depression has a genetic origin.
conclusion - ANSWER: In conclusion, based on the results of the study, depression
may have a genetic and biological origin.
