Podcast
Questions and Answers
What is the purpose of ultrasonography in prenatal screening?
What is the purpose of ultrasonography in prenatal screening?
- To carry out at specific weeks to detect abnormalities or disorders (correct)
- To perform a biopsy via catheter through the cervix or by transabdominal puncture
- To measure maternal serum levels of AFP, hCG, and uE3
- To detect echoes reflecting from organ boundaries and convert them to images on a monitor
What does amniocentesis involve?
What does amniocentesis involve?
- Carrying out genetic screening via maternal serum analysis
- Inserting a needle through the mother's abdominal wall to withdraw an amniotic fluid sample (correct)
- Localization of the placenta by ultrasound
- Performing a biopsy via catheter through the cervix or by transabdominal puncture
What is the purpose of syncytiotrophoblast biopsy?
What is the purpose of syncytiotrophoblast biopsy?
- To measure maternal serum levels of AFP, hCG, and uE3
- To be used as a component of screening for fetus trisomy (correct)
- To detect echoes reflecting from organ boundaries and convert them to images on a monitor
- To guide a needle insertion through the mother's abdominal wall to withdraw an amniotic fluid sample
At what stage of gestation can anencephaly be detected?
At what stage of gestation can anencephaly be detected?
What is the risk of miscarriage associated with chorionic villus sampling performed at 10-12 weeks?
What is the risk of miscarriage associated with chorionic villus sampling performed at 10-12 weeks?
What does maternal serum analysis measure during genetic screening?
What does maternal serum analysis measure during genetic screening?
Which type of mutation results in changes to the nucleotide sequence of DNA in somatic cells?
Which type of mutation results in changes to the nucleotide sequence of DNA in somatic cells?
What type of mutation occurs when a base substitution changes an amino acid in a protein?
What type of mutation occurs when a base substitution changes an amino acid in a protein?
What is the effect of a deletion or insertion of one or more nucleotides that does not result in a multiple of 3?
What is the effect of a deletion or insertion of one or more nucleotides that does not result in a multiple of 3?
Which type of mutation causes a 'sense' codon to become a 'coding' codon?
Which type of mutation causes a 'sense' codon to become a 'coding' codon?
What is the effect of reciprocal translocation between non-homologous chromosomes?
What is the effect of reciprocal translocation between non-homologous chromosomes?
What causes an acrocentric chromosome to fuse into a single, large chromosome with a single centromere?
What causes an acrocentric chromosome to fuse into a single, large chromosome with a single centromere?
What is the effect of duplication of a segment of chromosomes during DNA replication?
What is the effect of duplication of a segment of chromosomes during DNA replication?
What is the effect of an intrinsic mutation between non-homologous chromosomes?
What is the effect of an intrinsic mutation between non-homologous chromosomes?
What is the effect of radiation or chemical exposure on genetic material?
What is the effect of radiation or chemical exposure on genetic material?
What is the cause of triploidy (3n) leading to miscarriage in most cases?
What is the cause of triploidy (3n) leading to miscarriage in most cases?
What is the effect of inversion leading to decreased binding of transcription factors and RNA polymerase to the promoter?
What is the effect of inversion leading to decreased binding of transcription factors and RNA polymerase to the promoter?
