Question
Biology Question on Principles of Inheritance and Variation
Given below is a representation of a kind of chromosomal mutation. What is the kind of mutation represented?
A
Deletion
B
Duplication
C
Inversion
D
Reciprocal translocation
Answer
Inversion
Explanation
Solution
Inversion involves a reverse order of genes in a part of chromosome. ABCDEFGH has been shown infigure where breakes occur between A and B as well as between D and E. Reunion at broken ends may lead to inversion of the segment BCD into DCB. In deletion, a section of chromosome is lost. In duplication a piece of chromosome is copied next to an identical section. In reciprocal translocation, a segment from a chromosome is translocated into a nonhomologous chromosome from which a segment is reciprocally transferred to the first chromosome.