Biology MCQs

Human Genetics MCQs with Answers

Which of the following is the basic unit of inheritance in humans?
a) Chromosome
b) Gene
c) Allele
d) Nucleotide
Answer: b) Gene

How many pairs of chromosomes are there in a human cell?
a) 20 pairs
b) 23 pairs
c) 26 pairs
d) 46 pairs
Answer: b) 23 pairs

Which type of genetic disorder is caused by the presence of an extra chromosome 21?
a) Down syndrome
b) Turner syndrome
c) Klinefelter syndrome
d) Cystic fibrosis
Answer: a) Down syndrome

Which of the following is an example of an autosomal dominant genetic disorder?
a) Hemophilia
b) Duchenne muscular dystrophy
c) Huntington’s disease
d) Cystic fibrosis
Answer: c) Huntington’s disease

Which genetic disorder is characterized by the absence of pigment in the skin, hair, and eyes?
a) Albinism
b) Sickle cell anemia
c) Tay-Sachs disease
d) Marfan syndrome
Answer: a) Albinism

Which of the following is an example of an autosomal recessive genetic disorder?
a) Huntington’s disease
b) Cystic fibrosis
c) Hemophilia
d) Duchenne muscular dystrophy
Answer: b) Cystic fibrosis

Which of the following genetic disorders is characterized by an abnormality in the X chromosome?
a) Turner syndrome
b) Down syndrome
c) Klinefelter syndrome
d) Fragile X syndrome
Answer: d) Fragile X syndrome

What is the probability of having a male child in a human genetic cross?
a) 25%
b) 50%
c) 75%
d) 100%
Answer: b) 50%

Which of the following genetic disorders is caused by the deletion of a portion of chromosome 15?
a) Down syndrome
b) Turner syndrome
c) Klinefelter syndrome
d) Prader-Willi syndrome
Answer: d) Prader-Willi syndrome

Which type of genetic disorder is caused by the presence of only one X chromosome in females?
a) Down syndrome
b) Turner syndrome
c) Klinefelter syndrome
d) Cystic fibrosis
Answer: b) Turner syndrome

Which of the following is an example of a sex-linked genetic disorder?
a) Cystic fibrosis
b) Huntington’s disease
c) Duchenne muscular dystrophy
d) Down syndrome
Answer: c) Duchenne muscular dystrophy

What is the probability of passing on a recessive genetic disorder to a child if both parents are carriers?
a) 0%
b) 25%
c) 50%
d) 100%
Answer: b) 25%

Which genetic disorder is characterized by the inability to properly metabolize phenylalanine?
a) Down syndrome
b) Turner syndrome
c) Phenylketonuria (PKU)
d) Cystic fibrosis
Answer: c) Phenylketonuria (PKU)

Which type of genetic disorder is caused by a change in a single nucleotide base?
a) Insertion
b) Deletion
c) Substitution
d) Duplication
Answer: c) Substitution

Which of the following genetic disorders is characterized by the inability to clot blood properly?
a) Hemophilia
b) Sickle cell anemia
c) Tay-Sachs disease
d) Marfan syndrome
Answer: a) Hemophilia

Which type of genetic disorder is caused by the presence of an abnormal number of chromosomes?
a) Monogenic disorder
b) Chromosomal disorder
c) Multifactorial disorder
d) Mitochondrial disorder
Answer: b) Chromosomal disorder

Which of the following is an example of a multifactorial genetic disorder?
a) Down syndrome
b) Cystic fibrosis
c) Sickle cell anemia
d) Diabetes mellitus
Answer: d) Diabetes mellitus

Which of the following is a technique used in human genetics to determine the presence of specific genes or mutations?
a) Polymerase chain reaction (PCR)
b) DNA microarray
c) Gel electrophoresis
d) Next-generation sequencing
Answer: a) Polymerase chain reaction (PCR)

What is the purpose of genetic counseling in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To provide information and support to individuals and families about genetic conditions
d) To manipulate the genetic material of individuals
Answer: c) To provide information and support to individuals and families about genetic conditions

Which of the following is an example of a prenatal genetic testing method?
a) Amniocentesis
b) Blood test
c) X-ray
d) Electrocardiogram (ECG)
Answer: a) Amniocentesis

What is the purpose of newborn screening in human genetics?
a) To determine the sex of the baby at birth
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of newborns
d) To detect chromosomal abnormalities in newborns
Answer: b) To screen for genetic disorders in newborns

Which of the following is an example of a genetic disorder that can be detected through newborn screening?
a) Down syndrome
b) Turner syndrome
c) Phenylketonuria (PKU)
d) Cystic fibrosis
Answer: c) Phenylketonuria (PKU)

Which type of genetic testing is used to determine if a person carries a specific genetic mutation?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: b) Carrier testing

Which of the following is an example of a genetic disorder that can be detected through carrier testing?
a) Down syndrome
b) Sickle cell anemia
c) Huntington’s disease
d) Cystic fibrosis
Answer: d) Cystic fibrosis

What is the purpose of preimplantation genetic diagnosis (PGD) in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of embryos before implantation
d) To detect chromosomal abnormalities in fetuses
Answer: c) To analyze the genetic makeup of embryos before implantation

Which type of genetic testing is used to diagnose or confirm the presence of a genetic disorder in an individual?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: a) Diagnostic testing

What is the purpose of predictive genetic testing in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of individuals to predict their risk of developing a genetic disorder
d) To detect chromosomal abnormalities in individuals
Answer: c) To analyze the genetic makeup of individuals to predict their risk of developing a genetic disorder

Which type of genetic testing is used to detect chromosomal abnormalities in a developing fetus?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: d) Prenatal testing

Which of the following is an example of a prenatal genetic testing method?
a) Amniocentesis
b) Blood test
c) X-ray
d) Electrocardiogram (ECG)
Answer: a) Amniocentesis

What is the purpose of genetic counseling in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To provide information and support to individuals and families about genetic conditions
d) To manipulate the genetic material of individuals
Answer: c) To provide information and support to individuals and families about genetic conditions

Which of the following is an example of a prenatal genetic testing method?
a) Amniocentesis
b) Blood test
c) X-ray
d) Electrocardiogram (ECG)
Answer: a) Amniocentesis

What is the purpose of newborn screening in human genetics?
a) To determine the sex of the baby at birth
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of newborns
d) To detect chromosomal abnormalities in newborns
Answer: b) To screen for genetic disorders in newborns

Which of the following is an example of a genetic disorder that can be detected through newborn screening?
a) Down syndrome
b) Turner syndrome
c) Phenylketonuria (PKU)
d) Cystic fibrosis
Answer: c) Phenylketonuria (PKU)

Which type of genetic testing is used to determine if a person carries a specific genetic mutation?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: b) Carrier testing

Which of the following is an example of a genetic disorder that can be detected through carrier testing?
a) Down syndrome
b) Sickle cell anemia
c) Huntington’s disease
d) Cystic fibrosis
Answer: d) Cystic fibrosis

What is the purpose of preimplantation genetic diagnosis (PGD) in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of embryos before implantation
d) To detect chromosomal abnormalities in fetuses
Answer: c) To analyze the genetic makeup of embryos before implantation

Which type of genetic testing is used to diagnose or confirm the presence of a genetic disorder in an individual?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: a) Diagnostic testing

What is the purpose of predictive genetic testing in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of individuals to predict their risk of developing a genetic disorder
d) To detect chromosomal abnormalities in individuals
Answer: c) To analyze the genetic makeup of individuals to predict their risk of developing a genetic disorder

Which type of genetic testing is used to detect chromosomal abnormalities in a developing fetus?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: d) Prenatal testing

What is the purpose of genetic counseling in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To provide information and support to individuals and families about genetic conditions
d) To manipulate the genetic material of individuals
Answer: c) To provide information and support to individuals and families about genetic conditions

Which of the following is an example of a prenatal genetic testing method?
a) Amniocentesis
b) Blood test
c) X-ray
d) Electrocardiogram (ECG)
Answer: a) Amniocentesis

What is the purpose of newborn screening in human genetics?
a) To determine the sex of the baby at birth
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of newborns
d) To detect chromosomal abnormalities in newborns
Answer: b) To screen for genetic disorders in newborns

Which of the following is an example of a genetic disorder that can be detected through newborn screening?
a) Down syndrome
b) Turner syndrome
c) Phenylketonuria (PKU)
d) Cystic fibrosis
Answer: c) Phenylketonuria (PKU)

Which type of genetic testing is used to determine if a person carries a specific genetic mutation?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: b) Carrier testing

Which of the following is an example of a genetic disorder that can be detected through carrier testing?
a) Down syndrome
b) Sickle cell anemia
c) Huntington’s disease
d) Cystic fibrosis
Answer: d) Cystic fibrosis

What is the purpose of preimplantation genetic diagnosis (PGD) in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of embryos before implantation
d) To detect chromosomal abnormalities in fetuses
Answer: c) To analyze the genetic makeup of embryos before implantation

Which type of genetic testing is used to diagnose or confirm the presence of a genetic disorder in an individual?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: a) Diagnostic testing

What is the purpose of predictive genetic testing in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of individuals to predict their risk of developing a genetic disorder
d) To detect chromosomal abnormalities in individuals
Answer: c) To analyze the genetic makeup of individuals to predict their risk of developing a genetic disorder

Which type of genetic testing is used to detect chromosomal abnormalities in a developing fetus?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: d) Prenatal testing

What is the purpose of genetic counseling in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To provide information and support to individuals and families about genetic conditions
d) To manipulate the genetic material of individuals
Answer: c) To provide information and support to individuals and families about genetic conditions

Which of the following is an example of a prenatal genetic testing method?
a) Amniocentesis
b) Blood test
c) X-ray
d) Electrocardiogram (ECG)
Answer: a) Amniocentesis

What is the purpose of newborn screening in human genetics?
a) To determine the sex of the baby at birth
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of newborns
d) To detect chromosomal abnormalities in newborns
Answer: b) To screen for genetic disorders in newborns

Which of the following is an example of a genetic disorder that can be detected through newborn screening?
a) Down syndrome
b) Turner syndrome
c) Phenylketonuria (PKU)
d) Cystic fibrosis
Answer: c) Phenylketonuria (PKU)

Which type of genetic testing is used to determine if a person carries a specific genetic mutation?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: b) Carrier testing

Which of the following is an example of a genetic disorder that can be detected through carrier testing?
a) Down syndrome
b) Sickle cell anemia
c) Huntington’s disease
d) Cystic fibrosis
Answer: d) Cystic fibrosis

What is the purpose of preimplantation genetic diagnosis (PGD) in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of embryos before implantation
d) To detect chromosomal abnormalities in fetuses
Answer: c) To analyze the genetic makeup of embryos before implantation

Which type of genetic testing is used to diagnose or confirm the presence of a genetic disorder in an individual?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: a) Diagnostic testing

What is the purpose of predictive genetic testing in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of individuals to predict their risk of developing a genetic disorder
d) To detect chromosomal abnormalities in individuals
Answer: c) To analyze the genetic makeup of individuals to predict their risk of developing a genetic disorder

Which type of genetic testing is used to detect chromosomal abnormalities in a developing fetus?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: d) Prenatal testing

What is the purpose of genetic counseling in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To provide information and support to individuals and families about genetic conditions
d) To manipulate the genetic material of individuals
Answer: c) To provide information and support to individuals and families about genetic conditions

Which of the following is an example of a prenatal genetic testing method?
a) Amniocentesis
b) Blood test
c) X-ray
d) Electrocardiogram (ECG)
Answer: a) Amniocentesis

What is the purpose of newborn screening in human genetics?
a) To determine the sex of the baby at birth
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of newborns
d) To detect chromosomal abnormalities in newborns
Answer: b) To screen for genetic disorders in newborns

Which of the following is an example of a genetic disorder that can be detected through newborn screening?
a) Down syndrome
b) Turner syndrome
c) Phenylketonuria (PKU)
d) Cystic fibrosis
Answer: c) Phenylketonuria (PKU)

Which type of genetic testing is used to determine if a person carries a specific genetic mutation?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: b) Carrier testing

Which of the following is an example of a genetic disorder that can be detected through carrier testing?
a) Down syndrome
b) Sickle cell anemia
c) Huntington’s disease
d) Cystic fibrosis
Answer: d) Cystic fibrosis

What is the purpose of preimplantation genetic diagnosis (PGD) in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of embryos before implantation
d) To detect chromosomal abnormalities in fetuses
Answer: c) To analyze the genetic makeup of embryos before implantation

Which type of genetic testing is used to diagnose or confirm the presence of a genetic disorder in an individual?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: a) Diagnostic testing

What is the purpose of predictive genetic testing in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To analyze the genetic makeup of individuals to predict their risk of developing a genetic disorder
d) To detect chromosomal abnormalities in individuals
Answer: c) To analyze the genetic makeup of individuals to predict their risk of developing a genetic disorder

Which type of genetic testing is used to detect chromosomal abnormalities in a developing fetus?
a) Diagnostic testing
b) Carrier testing
c) Predictive testing
d) Prenatal testing
Answer: d) Prenatal testing

What is the purpose of genetic counseling in human genetics?
a) To determine the sex of the baby during pregnancy
b) To screen for genetic disorders in newborns
c) To provide information and support to individuals and families about genetic conditions
d) To manipulate the genetic material of individuals
Answer: c) To provide information and support to individuals and families about genetic conditions

 

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