BOTANY : Genetics Mock Test 2

🟥 BOTANY : Genetics Mock Test 2

🟥 QUESTIONS :23

🟥 TIME : 20 MINS

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1)

Who gave the first example for the inheritance of cytoplasmic gene through maternal parent in his experiments in Mirabilis jalapa
-

A) Stephan Hales -

B) Carl Correns -

C) Mendel -

D) - Mereschkowsky

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2)

In chloroplast inheritance in four -O'clock plant, the cross between female variegated and male white resulting phenotype of progeny have
-

A) white -

B) - Variegated,green,or white -

C) None of these

D) Green -

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3)

The shell coiling of Limnaea is due to
-

A) Maternal effect -

B) it is determined not by its genotype,but by thegenotype of female parent. -

C) Option (a) iscorrect -

D) Both are correct

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4)

Read the following sentences about extrachromosomal inheritance.
a) The phenotype of the branch bearing the female parent in each case determines the phenotype of the progeny.
b) The male parent make no contribution to the phenotype of the progeny. ]
-

A) Only(a)is correct

B) - Only ( b) is correct -

C) Both are correct -

D) Both are incorrect

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5)

Chromosomal theory of linkage proposed by ]
-

A) Morgan

B) - Castle

C) - Muller -

D) A&B

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6)

: Crossing over occurs during
-

A) Zygotene stag -

B) Leptotene stage -

C) Pachytene stage -

D) Anaphase

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7)

The first chromosome map was published by
-

A) Morgan and castle

B) - Alfred H Sturtevant

C) - Muller -

D) B&C

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8)

: Number of linkage group of organisms given below. Find out the incorrect one
-

A) Drosophila - 4

B) - Maize - 10 -

C) Human - 23 -

D) Garden pea - 8

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9) Percentage of crossing over is more when

✔️

A) genes are located in a different cell

B) genes are not linked linked

C) genes are located close to each other linked

D) genes are located far apart from each other

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10)

If gene frequency between genes a and c is 2%; b and c is 13%; b and d 4%; a and b 15%; c and d 17%and a and d 19%. The sequence of genes in a chromosome is
-

A) a,d,b,c -

B) d, b, a, c

C) - a, b, c, d -

D) a, c, b, d

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11) There are 4 pairs of chromosomes in a Drosophila. The linkage groups present in it are

A) one more than the pair of chromosomes

B) one less than the pair of chromosomes (c)

C) four

D) eight

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12)

. If the percentage of crossing over between two genes is 10, then the distance between two genes will be
(a)

A) 5 morganoid

B) 10 morgan

C) 20 centimorgans

D) 40 map units

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13) Repulsion and coupling are two faces of

A) mutation

B) chiasmata

C) linkage

D) crossing over

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14)

Complete linkage is observed in
-

A) Male drosophila -

B) Female drosophila

C) - Birds -

D) Maize

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15)

During crossing over , genes and chromosomes are reassorted as a result of exchange of parts of chromatids between
-

A) Heterologous chromosomes -

B) Homozygous chromosomes -

C) Sex chromosomes -

D) Homologous chromosomes

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16) There are 4 pairs of chromosomes in a Drosophila. The linkage groups present in it are

A) - Two

B) - Four -

C) Eight

D) - Sixteen

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17)

: Repulsion and coupling are two faces of
-

A) Mutation -

B) Chiasmata -

C) Linkage -

D) Crossing over

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18)

The crossing over of genes occurs in 50% of the cases of a hybrid AaBb . Which of the following set of gametes may be formed?
-

A) Aa=50% Bb = 50% -

B) ab= 25% AB=75% -

C) AB=25% aB=25% Ab=25% aB=25% -

D) AB=50% ab=50%

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19)

Crossing over occurs between
-

A) Non-sister chromatids of non-homologous chromosome at zygotene stage of prophase-I

B) Sister chromatids of homologous chromosome at pachytene stage of prophase-I

C) - Sister chromatids of non-homologous chromosome at zygotene stage of prophase-I

D) - Non-sister chromatids of homologous chromosome at pachytene stage of prophase-I -

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20)

Mirabilis jalapa resembles a good example of
-

A) Plastid inheritance

B) - Mitochondrial inheritance

C) - Mandelian inheritance -

D) All of these

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21)

Linkage was discovered by
-

A) Blakeslee

B) - Sutton

C) - Morghan

D) - Bateson

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22) Genes for cytoplasmic male sterility in plants are located in

A) - Chloroplast genome

B) - Nuclear genome -

C) Mitochondrial genome

D) - Cytosol

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23) Genes located on mitochondrial DNA bring about

A) - Paternal inheritance -

B) Maternal inheritance -

C) Biparental inheritance -

D) No inheritance

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BOTANY : Genetics Mock Test 2

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