Genetic Disorders
Biology ⇒ Genetics and Heredity
Genetic Disorders starts at 9 and continues till grade 12.
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A child is born with cystic fibrosis, but neither parent shows symptoms. What does this indicate about the parents' genotypes?
A karyotype showing 47 chromosomes with XXY indicates which disorder?
A pedigree shows a trait that appears in every generation and affects both males and females equally. What is the most likely mode of inheritance?
Describe the genetic cause of Down syndrome.
A child is born with cystic fibrosis, but neither parent shows symptoms. What does this indicate about the parents' genotypes?
A couple has a child with Tay-Sachs disease. What is the probability that their next child will also have the disease?
A karyotype showing 47 chromosomes with XXY indicates which disorder?
A pedigree shows a trait that appears in every generation and affects both males and females equally. What is the most likely mode of inheritance?
Which chromosomal abnormality causes Turner syndrome?
(1) Trisomy 21
(2) Monosomy X
(3) Trisomy 18
(4) XXY
Which of the following genetic disorders is sex-linked?
(1) Sickle cell anemia
(2) Hemophilia
(3) Cystic fibrosis
(4) Down syndrome
Which of the following is a chromosomal disorder caused by nondisjunction?
(1) Sickle cell anemia
(2) Down syndrome
(3) Hemophilia
(4) Cystic fibrosis
Which of the following is a common feature of autosomal recessive disorders?
(1) Affects only males
(2) Skips generations
(3) Always fatal
(4) Only affects children of affected parents
Cystic fibrosis is caused by a mutation in the gene that codes for the _______ protein.
Fill in the blank: The genetic disorder _______ is caused by a deletion of a segment on chromosome 5.
Fill in the blank: The genetic disorder _______ is caused by a mutation in the gene responsible for producing the enzyme hexosaminidase A.
Fill in the blank: The genetic disorder _______ is characterized by progressive muscle weakness and is caused by a mutation in the dystrophin gene.
True or False: All chromosomal disorders are caused by an abnormal number of chromosomes.
True or False: All genetic disorders are inherited from parents.
True or False: All mutations in DNA result in genetic disorders.
True or False: Down syndrome is caused by the presence of an extra chromosome 21.
