Chromosomal Aberrations Objective Type Questions and Answers

Questions

21 Choose the wrong option.

A Double cross over in paracentric inversion is lethal

B There is genetic imbalance in gametes produced by paracentric inversion cross over

C Paracentric inversion cross over products is non-viable

D Pacentric non-cross over gametes segregates normally

View Answer

Answer: Double cross over in paracentric inversion is lethal

22 Which of the following is an example of inversion?

A Chromosome 14

B Chromosome 3

C Chromosome 22 and 9

D Chromosome 8

View Answer

Answer: Chromosome 3

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23 What will be the effect of the deletion mutation of a gene at the telomere?

A Mild effect on the phenotype

B Organism will dye

C No effect

D Organism will develop serious hazards due to absence of the gene and its product

View Answer

Answer: No effect

24 Which of the following is not a possible cause of lethality of individuals carrying a deletion mutation?

A Lack of diversity

B Genomic imbalance

C Genes that are not haplo sufficient doesn’t produce adequate gene product

D Unmasking of lethal recessive alleles

View Answer

Answer: Lack of diversity

25 The appearance of a recessive phenotype due to deletion of dominant gene is called_______________

A Hemi-dominance

B DNA, RNA And Proteins

C Imperfect dominance

D Co-dominance

View Answer

Answer: Pseudo dominance

26 The haploid set of the chromosomes is called as

A Genome

B Proteome

C Genomics

D Genes

View Answer

Answer: Genome

27 The term ‘chromosome (chrom=color, soma=body)’ was coined by

A Waldeyer

B W. Flemming

C Sutton

D W.Roux

View Answer

Answer: Waldeyer

28 Which of the following has the largest number of chromosome?

A Giant redwood tree

B Haplopappus gracilis

C Pisum sativum

D Ophioglossum reticulatum

View Answer

Answer: Ophioglossum reticulatum

29 Which of the following statement is incorrect

A In humans, there are 44 autosomes and a pair of sex chromosomes

B In human females, there are 44 autosomes and a pair of homomorphic sex chromosomes

C In human males, there are 44 autosomes and a pair of homomorphic sex chromosomes

D In human males, there are 44 autosomes and a pair of heteromorphic sex chromosomes

View Answer

Answer: In human males, there are 44 autosomes and a pair of homomorphic sex chromosomes

30 A functional chromosome has

A An Origin Of Replication

B A Centromere

C A Telomere

D All Of These

View Answer

Answer: All Of These

31 The diagrammatic representation of karyotype (morphological representation of chromosomes) of a species is called

A Cladogram

B Chromogram

C Idiogram

D Ecogram

View Answer

Answer: Cladogram

32 In pericentric inversion, the inversion loop involves __________ strands.

A 4

B 0

C 7

D None

View Answer

Answer: 4

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