Chapter 13: Chromosomes, Mapping And The Meiosis Inheritance Connection
- 1.The theory of chromosomal inheritance was first proposed by
- A.
Mendel.
- B.
Morgan.
- C.
Knight.
- D.
Sutton.
- E.
Stern.
- 2.In Drosophila, the sex of an individual is influenced by the number of copies of which chromosome?
- A.
Autosome
- B.
X
- C.
1
- D.
2
- E.
White
- 3.The white eye mutation in Drosophila was shown to be sex-linked and caused by a gene residing on chromosome
- A.
X.
- B.
Y.
- C.
1.
- D.
2.
- E.
Autosome.
- 4.The geneticist who discovered the white eye mutation in Drosophila and helped establish that genes are carried on chromosomes was
- A.
Mendel.
- B.
Sutton.
- C.
Sturtevant.
- D.
Janssens.
- E.
Morgan.
- 5.Genetic exchange between two arms of a chromosome pair is more likely to occur if the distance between the genes is great. It is called
- A.
Epistasis.
- B.
Pleiotropy.
- C.
Crossing over.
- D.
Allelic exchange.
- E.
Mutation.
- 6.Occasionally, chromosomes fail to separate during meiosis, leading to a condition in which the diploid number is not normal. This phenomenon is called
- A.
Epistasis.
- B.
Nondisjunction.
- C.
Disjunction.
- D.
Pleiotropy.
- E.
Autosomy.
- 7.Humans who have lost even one copy of an autosome are called
- A.
Tetrasomics.
- B.
Trisomics.
- C.
Bisomics.
- D.
Monosomics.
- E.
Nullisomics.
- 8.The most common condition of trisomy, in which three copies of a chromosome are present instead of the normal two, is of chromosome
- A.
X.
- B.
13.
- C.
15.
- D.
18.
- E.
21.
- 9.If a human female has two Barr bodies, it is almost certain that
- A.
Her father had at least one Barr body.
- B.
Her mother also had two Barr bodies.
- C.
She developed from a fertilized egg with 3 X chromosomes.
- D.
She is actually a male with female characteristics.
- E.
She is genetically a normal fertile female.
- 10.A human female with only one X chromosome is said to have a condition called
- A.
Alzheimer's disease.
- B.
Hemophilia.
- C.
Turner syndrome.
- D.
Klinefelter syndrome.
- E.
Down syndrome.
- 11.If some alternative alleles with detrimental effects exist in significant proportions in populations, the condition is called
- A.
Pleiotropy.
- B.
A syndrome.
- C.
Epistasis.
- D.
A genetic disorder.
- E.
A genetic imbalance.
- 12.The most common fatal genetic disorder of Caucasians is
- A.
Cholera.
- B.
Cystic fibrosis.
- C.
Hemophilia.
- D.
Sickle cell anemia.
- E.
Muscular dystrophy.
- 13.In sickle cell anemia, the defective hemoglobin differs from the normal hemoglobin by
- A.
The color of the pigment.
- B.
The size of the molecule.
- C.
A single amino acid substitution.
- D.
The total number of amino acids.
- E.
The type of blood cell it is found in.
- 14.Hemophilia is a
- A.
Recessive condition.
- B.
Dominant condition.
- C.
Epistatic condition.
- D.
Codominant condition.
- E.
Condition that occurs with equal frequency in both sexes.
- 15._______________ is a human hereditary disease that is caused by a dominant allele but does not show up in affected individuals until they are in middle age.
- A.
Cystic fibrosis
- B.
Sickle cell anemia
- C.
Tay-Sachs disease
- D.
Huntington's disease
- E.
Hemophilia
- 16.Amniocentesis is a procedure that is normally used
- A.
To reduce the risk of genetic disease.
- B.
For gene therapy.
- C.
To change the sex of the fetus.
- D.
For diagnosis of genetic disorders.
- E.
For nourishing the fetus.
- 17.Sickle cell anemia is caused by a defect in the
- A.
Oxygen carrying pigment hemoglobin.
- B.
Protein makeup in the liver.
- C.
Sticky sides of the red blood cells.
- D.
Allele for the production of mucus in the lungs.
- 18.How many Barr bodies does a normal human female contain in her cells?
- A.
0
- B.
1
- C.
2
- D.
3
- 19.A test cross can be used to do all of the following except
- A.
Determine whether an individual that displays a dominant phenotype is homozygous for the trait.
- B.
Determine whether an individual that displays a dominant phenotype is heterozygous for the trait.
- C.
Gather genotype information from phenotype information.
- D.
Identify the chromosome on which a gene is located.
- 20.In humans, if a non-disjunction event led to an individual with a genotype of XO, they would
- A.
Be female because they do not have a Y chromosome.
- B.
Be male because they only have one X chromosome.
- C.
Display both male and female characteristics.
- D.
Not survive.
- 21.In humans, if a non-disjunction event led to an individual with a genotype of XXY, they would
- A.
Be female because they have two X chromosomes.
- B.
Be male because they have a Y chromosome.
- C.
Display both male and female characteristics.
- D.
Not survive.
- 22.If a female was a carrier for sex-linked color blindness, what percentage of her male children would also be color blind?
- A.
0%
- B.
25%
- C.
50%
- D.
100%
- 23.Genetic differences between individuals in a population are called
- A.
Markers.
- B.
Alleles.
- C.
Polymorphisms.
- D.
Genetic disorders.
- 24.Which of the following statements about calico cats is false?
- A.
Calico cats can be male or female.
- B.
The different colored fur is due to the inactivation of one X chromosome.
- C.
The variation in coat color is an example of an epistatic interaction.
- D.
Calico cats are genetic mosaics.
- 25.Which offspring will inherit all their mitochondria DNA from their mother and none from their father?
- A.
Daughters
- B.
Sons
- C.
Both sons and daughters
- D.
Mitochondria DNA is inherited from both parents.
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