Principle Of Inheritance And Variation Question 406
Question: Assertion : Translocations may not involve a loss or an addition of chromosome. Reason : During translocation a part of a chromosome becomes detached and joins a part of a nonhomologous chromosome.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
Show Answer
Answer:
Correct Answer: A
Solution:
Sometimes a part of chromosome becomes detached and joins a part of a nonhomologous chromosome, thus producing a translocation.
In heteromorphic sex chromosomes, exchanges may occur between nonhomologous parts of the same chromosome pair.
Translocations may not involve a loss or an addition of chromosome material, but frequently they do become associated with deficiencies and duplications, unbalanced combinations of genetic units.
BETA
