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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

Answer: expressivity

27 Which of the following denotes a pair of contrasting characters?

A Alleles

B Genotype

C Phenotype

D Homozygous

View Answer

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

View Answer

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

View Answer

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

View Answer

Answer: translocation heterozygote

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