GBHSS PENNAGARAM 12 F BOTANY

Alternative forms of a gene are/is called

• (a) Genome

• (b) Alleles

• (c) Genotype

• (d) Genetic code

The first cell of male gametophyte in angiosperm is

• (a) Nucleus

• (b) Microspore

• (c) Primary Endosperm Nucleus

• (d) Megaspore

Fruit colour in squash is an example of

• (a) Complementary genes

• (b) Recessive epistasis

• (c) Inhibitory genes

• (d) Dominant epistasis

An allohexaploidy contains

• (a) Six different genomes

• (b) Six copies of three different genomes

• (c) Two copies of three different genomes

• (d) Six copies of one genome

Assertion (A) : Gamma rays are generally used to induce mutation in wheat varieties.

Reason : Because they carry lower energy to non-ionize electrons from atom.

• (a) (A) is wrong, (R) is correct

• (b) (A) and (R) are correct

• (c) (A) and (R) are wrong

• (d) (A) is correct, (R) is wrong

The scar left by Funiculus in the seed is

• (a) tegmen

• (b) radicle

• (c) epicotyl

• (d) hilum

If a homozygous red flowered plant is crossed with a homozygous white flowered plant then the off- spring will be

• (a) All red flowered

• (b) Pink flowered

• (c) Half red flowered

• (d) All white flowered

Coleorhiza is found in

• (a) Paddy

• (b) Beans

• (c) Pea

• (d) Tridax

Which of the following represent Megagametophyte

• (a) Nucellus

• (b) Ovule

• (c) Endosperm

• (d) Embryo sac

Size of pollen grain in myosotis is __________ micrometer.

• (a) 10

• (b) 2000

• (c) 20

• (d) 200