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Animal Biotechnology Quiz | Animal Biotechnology Objective Type Questions and Answers

Questions
21 Exchange of segments between non homologous chromosomes is best known as
A translation
B translocation
C recombination
D crossing over

Answer: translocation
22 Incase of inversion when the inverted segment of chromosome includes centromere, it is known as
A inverted inversion
B pericentric inversion
C paracentric inversion
D double inversion

Answer: pericentric inversion
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23 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 paracentric inversion
B double inversion
C pericentric inversion
D none of these

Answer: paracentric inversion
24 The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as
A penetrance
B environmental influence
C expressivity
D inheritance percent

Answer: penetrance
25 Diethyl stilbestrol (DES), a synthetic estrogen causes
A centriole elongation
B chromosome lagging
C disruption of mitotic spindle
D all of the above

Answer: all of the above
26 The degree or extent to which a given genotype is expressed phenotypically in a particular individual is defined as
A expressivity
B inheritance strength
C environmental influence
D penetrance

Answer: expressivity
27 Which of the following denotes a pair of contrasting characters?
A Alleles
B Genotype
C Phenotype
D Homozygous

Answer: Alleles
28 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

Answer: duplication in region of chromosome
29 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 None of the above

Answer: idiogram
30 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

Answer: translocation heterozygote

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