Free Printable GBHSS PENNAGARAM 12 F BOTANY

1.

Alternative forms of a gene are/is called

a)

(a) Genome

b)

(b) Alleles

c)

(c) Genotype

d)

(d) Genetic code

2.

The first cell of male gametophyte in angiosperm is

a)

(a) Nucleus

b)

(b) Microspore

c)

(c) Primary Endosperm Nucleus

d)

(d) Megaspore

3.

Fruit colour in squash is an example of

a)

(a) Complementary genes

b)

(b) Recessive epistasis

c)

(c) Inhibitory genes

d)

(d) Dominant epistasis

4.

An allohexaploidy contains

a)

(a) Six different genomes

b)

(b) Six copies of three different genomes

c)

(c) Two copies of three different genomes

d)

(d) Six copies of one genome

5.

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) (A) is wrong, (R) is correct

b)

(b) (A) and (R) are correct

c)

(c) (A) and (R) are wrong

d)

(d) (A) is correct, (R) is wrong

6.

The scar left by Funiculus in the seed is

a)

(a) tegmen

b)

(b) radicle

c)

(c) epicotyl

d)

(d) hilum

7.

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

a)

(a) All red flowered

b)

(b) Pink flowered

c)

(c) Half red flowered

d)

(d) All white flowered

8.

Coleorhiza is found in

a)

(a) Paddy

b)

(b) Beans

c)

(c) Pea

d)

(d) Tridax

9.

Which of the following represent Megagametophyte

a)

(a) Nucellus

b)

(b) Ovule

c)

(c) Endosperm

d)

(d) Embryo sac

10.

Size of pollen grain in myosotis is __________ micrometer.

a)

(a) 10

b)

(b) 2000

c)

(c) 20

d)

(d) 200

11.

Extra nuclear inheritance is a consequence of presence of genes in

a)

(a) Mitochondria and chloroplasts

b)

(b) Endoplasmic reticulum and mitochondria

c)

(c) Ribosomes and chloroplasts

d)

(d) Lysosomes and ribosomes

12.

The single gene affects multiple traits and alters the phenotype of In the organism.

a)

(a) Lethal genes

b)

(b) Epistatic

c)

(c) Pleiotropy

d)

(d) Hypostatic

13.

Transmitting tissue is found in

a)

(a) Micropylar region of ovule

b)

(b) Pollen tube wall

c)

(c) Stylar region of gynoecium

d)

(d) Integument

14.

The Dominant Epistasis ratio is

a)

(a) 9 : 3 : 4

b)

(b) 9 : 3 : 3 : 1

c)

(c) 9 : 6 : 1

d)

(d) 12 : 3 : 1

15.

In Mendel’s experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), Yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY×rryy?

a)

a) Only wrinkled seeds with green cotyledons

b)

b) Only round seeds with green cotyledons

c)

c) Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons

d)

d) Only wrinkled seeds with yellow cotyledons

GBHSS PENNAGARAM 12 F BOTANY

Total questions: 15

Worksheet time: 8mins

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