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

A human female with turner's syndrome

(1) has 45 chromosomes with XO

(2) has one additional X-chromosome

(3) exhibits male characters

(4) is able to produce children with normal husband

Which of the following statements is not true of two genes that show 50% recombination frequency?

(1) the genes may be on different chromosomes 

(2) the genes are tightly linked

(3) the genes show independent assortment

(4) If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis

Which Mendelian idea is depicted by a cross in which the F₁ generation resembles both the parents?

(1) Incomplete dominance

(2) Law of dominance

(3) Inheritance of one gene

(4) Codominance

The incorrect statement with regard to haemophilia is

(1) it is a sex-linked disease

(2) it is a recessive disease

(3) it is a dominant disease

(4) a single protein involved in the clotting of blood effected

A normal-visioned man whose father was colourblind, marries a woman whose father was also a colourblind. They have their first child as a daughter. What are the chances that this child would be colourblind?

(1) 100%

(2) 0%

(3) 25%

(4) 50%

Which one of the following conditions correctly describes the manner of determining the sex in the given example?

(1) XO type of sex chromosomes determine male sex in grasshopper

(2) XO condition in humans as found in Turner syndromee, determines female sex

(3) Homozygous sex chromosomes (XX) produce male in  Drosophila

(4) Homozygous sex chromosomes (ZZ) determine female sex in birds

Mutations can be induced with 

(1) IAA

(2) ethylene

(3) gama radiations

(4) infra red radiations

Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?

(1) The discrete unit controlling a particular character is called a factor

(2) Out of one pair of factors one is dominant, and the other is recessive

(3) Alleles do not show any blendings and both the characters recover as such in F₂ generation.

(4) Factors occur in pairs