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Animal Biotechnology Chromosomes MCQ Questions & Answers

Animal Biotechnology Chromosomes MCQs : This section focuses on the "Animal Biotechnology Chromosomes". These Multiple Choice Questions (MCQs) should be practiced to improve the Animal Biotechnology Chromosomes skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

An odd number of cross overs in inverted region will result into formation of a dicentric chromatid and acentric chromatid at anaphase I incase of

A. pericentric inversion
B. paracentric inversion
C. double inversion
D. None of the above

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Question 2

The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as

A. penetrance
B. expressivity
C. inheritance percent
D. environmental influence

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Question 3

Diethyl stilbestrol (DES), a synthetic estrogen causes

A. chromosome lagging
B. disruption of mitotic spindle
C. centriole elongation
D. All of the above

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Question 4

Bar eye character of Drosophila is due to

A. duplication in region of 16A of X chromosome
B. deletion in region of 16A of X chromosome
C. due to presence of additional X-chromosome
D. due to a point mutation in eye-locus

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Question 5

Transmission of a gene from male parent to female child to male grand child is known as

A. holandric inheritance
B. quantitative inheritance
C. criss-cross inheritance
D. maternal inheritance

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Question 6

The degree or extent to which a given genotype is expressed phenotypically in a particular individual is defined as

A. penetrance
B. expressivity
C. inheritance strength
D. environmental influence

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Question 7

How many chromosomes are there in Caernorhabditis elegans?

A. 3
B. 6
C. 9
D. 12

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Question 8

If two genes show 50% recombination

A. they are on different chromosomes
B. they are on same chromosome but far apart
C. Both A and B
D. they are closely located on the same chromosome

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Question 9

Which of the following denotes a pair of contrasting characters?

A. Alleles
B. Phenotype
C. Homozygous
D. Genotype

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Question 10

A map of chromosomes that utilizes cloned and sequenced DNA fragments rather than genetic markers is known as

A. a physical map
B. a genetic map
C. a cloning map
D. None of the above

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Question 11

In a dihybrid cross, the progeny of an Fl individual (hetero2ygous for both characters) will show a phenotypic ratio of

A. 1:1:1:1
B. 1:2:2:1
C. 9:3:3:1
D. 3:1:1:3

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Question 12

In an organism, the chromosome number is maintained constant because of

A. independent assortment
B. crossing over
C. DNA duplication
D. synapsis

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Question 13

How many chromosomes are there in the budding yeast (S. cerevisiae)?

A. 16
B. 17
C. 18
D. 20

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Question 14

Which of the following is correct when a character shows continuous variation assuming a normal distribution?

A. It is governed by many genes with small cumulative effect
B. It is not controlled genetically
C. Many of the variation is due to fluctuation of climate
D. None of the above

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Question 15

Raphanobrassica is a classical example of

A. aneuploidy
B. nullisomy
C. allopolyploidy
D. None of the above

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Question 16

How does dosage compensation in Drosophila occur?

A. Hypertranscription of male X chromosome
B. Hypotranscription of female X chromosome
C. X inactivation in females
D. Chimerism

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Question 17

Hairy wing character of Drosophila is due to

A. duplication in region of chromosome
B. deletion in region of chromosome
C. due to presence of additional X-chromosome
D. due to a point mutation

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Question 18

A diagram depicting chromosomes of haploid set of an organism ordered in a series of decreasing size is known as

A. zymogram
B. chromogram
C. idiogram
D. karyogram

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Question 19

A cross shaped (+) or a ring involving four chromosomes may be formed during metaphase I in case of

A. translocation heterozygote
B. deficiency
C. haploid organism
D. duplication

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Question 20

Incase of inversion when the inverted segment of chromosome includes centromere, it is known as

A. paracentric inversion
B. double inversion
C. inverted inversion
D. pericentric inversion

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Question 21

A map of chromosomes that utilizes cloned and sequenced DNA fragments rather than genetic markers is known as

A. a physical map
B. a genetic map
C. a cloning map
D. none of these

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Question 22

An odd number of cross overs in inverted region will result into formation of a dicentric chromatid and acentric chromatid at anaphase I incase of

A. pericentric inversion
B. paracentric inversion
C. double inversion
D. none of these

View Answer

Question 23

Exchange of segments between non homologous chromosomes is best known as

A. translation
B. translocation
C. recombination
D. crossing over

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Question 24

If two genes show 50% recombination

A. they are on different chromosomes
B. they are on same chromosome but far apart
C. both (a) and (b)
D. they are closely located on the same chromosome

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