Principles Of Inheritance And Variation Ques 173
173. The formation of multivalents at meiosis in a diploid organism is due to
[1998]
(a) inversion
(b) deletion
(c) monosomy
(d) reciprocal translocation
Show Answer
Answer : d
Hints & Solution
(d) Inversion is a change in chromosomal architecture in which part of the chromosome gets inverted in its position so that the sequence of the genes in the inverted region is reversed. In deletion, a segment of a chromosome breaks and is lost. Monosomy is a type of deletion involving deficiency of one chromosome $(2 n-1)$. In reciprocal translocation, there is a mutual exchange of segments between two non-homologous chromosomes.
BETA
