Match the terms in Column I with their description in Column II and choose the correct option.

Column I	Column II
A. Dominance	1. Many genes govern a single character
B. Codominance	2. Ina heterozygous organism only one allele expresses itself
C. Pleiotropy	3. In a heterozygous organism both alleles express themselves fully
D. Polygenic inheritance	4. A single gene influences many characters

Codes : 

	A	B	C	D
(1)	2	3	4	1
(2)	4	1	2	3
(3)	4	3	1	2
(4)	2	1	4	3

Which of the following most appropriately describes haemophilia?

(1) X-linked recessive gene disorder

(2) Choromosomal disorder

(3) dominant gene disorder

(4) Recessive gene disorder

In angiosperms, microsporogenesis and megasporogenesis

(1) occur in anther

(2) form gametes without further divisions

(3) involve meiosis

(4) occur in ovule

Destruction of the anterior horn cells of the spinal cord would result in loss of 

(1) sensory impulses

(2) voluntary motor impulses

(3) commissural impulses

(4) integrating impulses

The cutting of DNA at specific locations became possible with the discovery of 

(1) restriction enzymes

(2) probes

(3) selectable markets

(4) ligases

The enzyme that is not present in succus entericus is

(1) maltase

(2) nucleases

(3) nucleosidase

(4) lipase

In which of the following interactions both partners are adversely affected?

(1) Competition

(2) Predation

(3) Parasitism

(4) Mutualism

Codes

In Bt cotton, the Bt toxin present in plant tissue as pro-toxin is converted into active toxin due to 

(1) Alkaline pH of the insect gut

(2) acidic pH of the insect gut

(3) action of gut microorganisms

(4) presence of conversion factors in insect gut

Fruit color in squash is an example of 

(1) recessive epistatis

(2) dominant epistatis

(3) complementary genes

(4) inhibitory genes