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

The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is testcrossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?

(a)

25 AB, 25 ab, 25 Ab, 25 aB

(b)

10 AB, 10 ab

(c)

45 AB, 45 ab

(d)

45 AB, 45 ab, 5 Ab, 5aB

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

Which of the following sentences are correct?
1. The offspring exhibit only parental combinations due to incomplete linkage
2. The linked genes exhibit some crossing over in complete linkage
3. The separation of two linked genes are possible in incomplete linkage
4. Crossing over is absent in complete linkage

(a)

1 and 2

(b)

2 and 3

(c)

3 and 4

(d)

1 and 4

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

Due to incomplete linkage in maize, the ratio of parental and recombinants are ______.

(a)

50:50

(b)

7:1:1:7

(c)

96.4: 3.6

(d)

1:7:7:1

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

The point mutation sequence for transition, transition, transversion and transversion in DNA are ______.

(a)

A to T, T to A, C to G and G to C

(b)

A to G, C to T, C to G and T to A

(c)

C to G, A to G, T to A and G to A

(d)

G to C, A to T, T to A and C to G

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

Changing the codon AGC to AGA represents _______.

(a)

missense mutation

(b)

nonsense mutation

(c)

frameshift mutation

(d)

deletion mutation

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

How many map units separate two alleles A and B if the recombination frequency is 0.09?

(a)

900 cM

(b)

90 cM

(c)

9 cM

(d)

0.9 cM