These chromosomal aberrations are due to the change in the morphology of the chromosome. These changes may occur in a single chromosome or in the double chromosome. Aberrations lead to the new location of genes and formation of imbalance miotic products which produces sterility in organisms and changes in their expression. Take this quiz to increase your knowledge about change in the structure of the chromosome.
1. Which abnormality arises due to the loss of part of the chromosome in the nucleoplasm?
A. Deletion
B. Inversion
C. Duplication
D. Translocation
2. Notched wing margin in drosophila is due to deletion of a segment in .........
A. Y chromosome
B. X chromosome
C. Both of these
D. None of these
3. Which one of the following is caused by the deletion in the short arm of chromosome number 5?
A. Super males
B. Edward syndrome
C. Cat cry syndrome
D. Down syndrome
4. Which gland of daughters of drosophila commonly show inversion through loop formation?
A. Endocrine gland
B. Exocrine gland
C. Mucous gland
D. Salivary gland
5. How many types of translocation?
A. 5
B. 4
C. 3
D. 2
6. Exchange of segments between non-homologous chromosomes is called.......
A. Simple translocation
B. Illegitimate crossing over
C. Shift translocation
D. All of these
7. Chronic myeloid leukemia is due to reciprocal translocation between Philadelphia chromosome with the long arm of.......... chromosome.
A. 5th
B. 7th
C. 8th
D. 9th
8. Sometimes two acrocentric chromosomes break at the kinetochore and join to form one metacentric chromosome, it is called.......
A. Simple translocation
B. Reciprocal translocation
C. Robertsonian translocation
D. Shift translocation
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