Question

Match List I(Chromosome aberrations) with List II(consequences) and select the correct a answer using the codes given the lists.

List-I	List-II
a. Intercalary deficiency	$1$. chromosome ring formation at metaphase
b. Duplication	$2$. Bridge and fragment formation
c. Para centric inversion	$3$. Change in gene order
d. Translocation	$4$. Two breaks followed by reunion and deletion

• A. A-$4$, B-$3$, C-$2$, D-$1$
• B. A-$4$, B-$3$, C-$1$, D-$2$
• C. A-$3$, B-$4$, C-$1$, D-$2$
• D. A-$3$, B-$4$, C-$2$, D-$1$

Answer 1

The correct option is A A-$4$, B-$3$, C-$2$, D-$1$

A paracentric inversion occurs when a portion of one chromosome , or a packet of genetic information, is flipped so that there is formation if a bridge and a fragment.

Duplication is a type of mutation that involves the production of one or more copies of a gene or region of a chromosome. Gene and chromosome duplications occur in all organisms, though they are especially prominent among plants. Gene duplication is an important mechanism by which evolution occurs. Gene duplication result in change in gene order.

Translocation is a type of chromosomal abnormality in which a chromosome breaks and a portion of it reattaches to a different chromosome. Chromosomal translocations can be detected by analyzing karyotypes of the affected cells and chromosome ring formation at metaphase.

Intercalary Deficiency is the absence of middle part(s) lying between a proximal-distal series of limb components; elements proximal to and distal to the absent part(s) of the chromosome are present.

So, the correct option is 'A