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

Match list I with list II

List I	list II
A. A pair of chromosomes extra with diploid	i) monosomy
B. One chromosome extra to the diploid	ii) tetrasomy
C. One chromosome loses from diploid	iii) trisomy
D.Two individual chromosomes lose from diploid	iv) double monosomy

(a)

A	B	C	D
i	iii	ii	iv

(b)

A	B	C	D
ii	iii	iv	i

(c)

A	B	C	D
ii	iii	i	iv

(d)

A	B	C	D
iii	ii	i	iv

Accurate mapping of genes can be done by three point test cross because increases _____.

(a)

Possibility of single cross over

(b)

Possibility of double cross over

(c)

Possibility of multiple cross over

(d)

Possibility of recombination frequency

Genes G S L H are located on same chromosome. The recombination percentage is between L and G is 15%, S and L is 50%, H and S are 20%. The correct order of genes is _____.

(a)

GHSL

(b)

SHGL

(c)

SGHL

(d)

HSLG

If haploid number in a cell is 18. The double monosomic and trisomic number will be _____.

(a)

35 and 37

(b)

34 and 37

(c)

37 and 35

(d)

17 and 19

Assertion (A): Gamma rays are generally use to induce mutation in wheat varieties.
Reason (R): Because they carry lower energy to non-ionize electrons from atom

(a)

A and R are correct

(b)

A is correct. R is wrong

(c)

A is wrong. R is correct

(d)

A and R are wrong

Which is not a feature of the chromosomal theory of inheritance?

(a)

Somatic cells of organisms are derived from zygote by repeated meiosis.

(b)

Chromosomes retain their structural uniqueness throughout the life of an organism.

(c)

Mendelian factors are located in chromosomes

(d)

Sutton and Boveri independently proposed the theory.

Number of chromosomes (2n) in Ophioglossum is _________

(a)

1226

(b)

1622

(c)

1262

(d)

2126

Incomplete linkage was reported by Hutchinson in ___________

(a)

Drosophila

(b)

Maize

(c)

Neurospora

(d)

Lathyrus odoratus

During cross over, chiasma occurs between

(a)

Sister chromatids of non-homologous chromosomes

(b)

Non-sister chromatids of non- homologous chromosomes

(c)

Non-sister chromatids of homologous chromosomes

(d)

Sister chromatids of homologous chromosomes

At which stage of meiosis, does the chromosomes undergo recombination process

(a)

Leptotene stage of prophase I

(b)

Zygotene stage of prophase I

(c)

Diplotene stage of prophase I

(d)

Pachytene stage of prophase I

Mutation theory was proposed by____________

(a)

T. H. Morgan

(b)

Hugo de Vries

(c)

Alfred Sturtevant

(d)

Sutton and Boveri

Which one of the following ploidy is irrelevant to others?

(a)

Monosomy

(b)

Trisomy

(c)

Tetrasomy

(d)

Pentasomy

_____ is called as "Father of Indian Green Revolution".

(a)

M.S. Swaminathan

(b)

P. Maheswari

(c)

Mendel

(d)

Nel Jayaraman

Observe the gene sequence and identify the types of aberration ABC BCD E F?

(a)

Tandem duplication

(b)

Simple duplication

(c)

Reverse tandem duplication

(d)

Displaced tandem duplication

If you cross dominant genotype PV/PV male Drosophila with double recessive female and obtain F₁ hybrid. Now you cross F₁ male with double recessive female.
i) What type of linkage is seen?
ii) Draw the cross with correct genotype.
iii) What is the possible genotype in F₂ generation?

s.no	gamete types	Number of progenies
1	ABC	349
2	Abc	114
3	abC	124
4	AbC	5
5	aBc	4
6	aBC	116
7	ABc	128
8	abc	360

i) What is the name of this test cross?
ii) How will you construct gene mapping from the above given data?
iii) Find out the correct order of genes.

Define linkage. Mention its types.

Crossing over occurs only in germinal cells. Yes or no. Support your answer.

Define terminalization.

Define the terms
(a) locus
(b) centimorgan.

What are multiple alleles?

How Sharbati Sonora was developed by Dr. M.S. Swaminathan et. al?

Differentiate Aneuploidy from Euploidy.

Given below are the gene sequences on the chromosome. Compare them with the normal chromosome and identify the type of structural chromosomal aberrations.
Normal Chromosome : A - B - C - D - E- F - G - H - I.
Chromosome 1 : A - B - C - B .C - D - E - F - G - H - I.
Chromosome 2 : A - B - C - D - F - G - H - I

Write the salient features of Sutton and Boveri concept.

Write the steps involved in molecular mechanism of DNA recombination with diagram.

What are the salient features of the chromosomal theory of inheritance ?

Give a short note on incomplete linkage.

How and where chiasma is formed?

What is recombination? Which is the widely accepted model of DNA recombination ?

List any three characteristic features of multiple allele.

What are comutagenes ?

Give an account on colchicine.

Study the figures given below and answer the questions.

Which type of cross produces higher recombinant percentage? Give reason in support of your answer.

How is Nicotiana exhibit self-incompatibility. Explain its mechanism.

Draw the diagram of different types of aneuploidy.

Mention the name of man-made cereal. How it is formed?

Why crossing over is important?

Explain hyperploidy with its types.

List out the significance of ploidy.

What is translocation? Write about its types.