Question

The gene se. The gene sequence of a chromosome is HIJKL.MNOPQ .
What chromosome change resulted in the following sequences of the
chromosome?
(a) HIJKNM.LOPQ
(b) HIJKL.MNONOPQ
(c) HIJKLLK.MNOPQ
(d) HIJKL.MNCDEFG

Answer 1

Answer: a) HIJKNM.LOPQ In this case, the first four units ‘HIJK’ remain untouched, while ‘L’ and
‘MN’ swap places and more, in ‘MN’ swap places ‘M’ and ‘N’. This is a case of translocation -
two non-homologous chromosomes exchange parts with each other, which causes genetic
diseases.
b) HIJKL.MNONOPQ In this case, there was a duplication of the site ‘NO’.
c) HIJKLLK.MNOPQ In this case, there was reversible duplication occurred, which is a fairly
common case of changing the copy number in the genome.
d) HIJKL.MNCDEFG  The result can not be obtained.