Sample question paper

The male gametes in plants are formed by:

1. AMitotic division of nucleus of vegetative cell
2. BMeiotic division of nucleus of vegetative cell
3. CMitotic division of nucleus of generative cell
4. DMeiotic division of nucleus of generative cell

The primary endosperm nucleus is formed by fusion of which of the following?

1. AA male gamete and a female gamete
2. BA male gamete and two polar nuclei
3. CA female gamete and two synergids
4. DTwo male gametes and an egg cell

During the menstrual cycle of a human female, formation of graafian follicle is stimulated by secretion of which of the following gonadotropin hormones?

1. AEstrogen and progesterone
2. BFSH and Estrogen
3. CFSH and LH
4. DProgesterone and LH

The experimental proof on the thermal stability of genetic material was first provided by experiments of

1. AHershey and Chase
2. BMeselson and Stahl
3. CFrederick Griffith
4. DJacob an Monod

Short stretches of DNA used to identify complementary sequences in a sample are called

1. AProbes
2. BMarkers
3. CPrimers
4. DMinisatellites

Select the incorrect statement among the following.

1. Ap²+2pq+q² = 1. This is binomial expansion of (p+q)².
2. BWhen frequency measured differs from expected values, the difference (direction) indicates the extent of evolutionary change.
3. CHardy-Weinberg principle says that phenotype frequencies in a population are stable and are constant from generation to generation.
4. DThe gene pool (total genes and their alleles in a population) remains constant. This is called genetic equilibrium. Sum total of all the allelic frequencies is 1.

"In Cricket species, the sound produced by rubbing the wings or legs together play a crucial role in attracting mates, any change in the morphology of Cricket legs could potentially affect their ability to produce sound”. A mutant Cricket had thicker hind legs. What would you expect for this cricket species?

1. AThe leg mutation will not lead to speciation if they diversify into new habitats.
2. BThe leg mutation will have little effect on other external features, and therefore have little effect on speciation.
3. CThe leg mutation will have no effect on behavior, and thus have little effect on speciation.
4. DThe leg mutation might lead to reproductive isolation and speciation due to an effect on the mating call.