21. A sudden change in the genome is called:
(a) Mutation✅
(b) Mutant
(c) change
(d) All above
22. A sudden change in gene structure is called:
(a) Gene defect
(b) Chromosome defect
(c) Mutation✅
(d) None
23. In the genome of a haploid organism each gene represents itself as a single:
(a) character
(b) Allele✅
(c) Genome
(d) antity
24. The gene in an individual for a particular trait represents:
(a) Genome
(b) Genotype✅
(c) Phenotype
(d) None
25. A trait having at least two distinct phenotype is called:
(a) Inferior trait
(b) normal trait
(c) Simple trait✅
(d) Good trait
26. What is genotypic ratio of offspring of a monohybrid cross.
(a) 1:2:1✅
(b) 1:1:1
(c) 3:1
(d) 9:3:3:1
27. Which is the genotype of diabetic person:
(a) DD
(b) Dd
(c) dd ✅
(d) None
28. What will be the chance of a diabetic baby, born to Parents both heterozygous normal:
(a) Zero
(b) ¼ ✅
(c) 3/4
(d) 1/2
29. Which is responsible for maleness?
(a) Y-chromosome✅
(b) X-chromosome
(c) Heterologous
(d) homologous
30. Which type of trait colour blindness is:
(a) Autosmal
(b) X-linked recessive✅
(c) X-linked
(d) Y-linked
31. Who was produced by genetic engineering:
(a) Jersey-Saiiwal cow
(b) Dhai ox
(c) Nancy sheep✅
(d) Rahn-thaila carp
32. Passing on of characteristics from parents to children is called:
(a) Heredity✅
(b) Genetics
(c) Rait study
(d) None
33. All instructions about life of a cell are encoded in:
(a) Gene✅
(b) chromosome
(c) Nucleotide
(d) None
34. Genetic variations among offspring’s lead to tremendous variety in their:
(a) Family
(b) genus
(c) Traits✅
(d) phyllum
35. DNA is know as:
(a) Gene material
(b) chromosomal material
(c) Evolutionary material
(d) Gentic material✅
36. Nucleotides of DNA are joined together in long chain called:
(a) Polynucleotide✅
(b) long nucleotide
(c) Straight nucleotide
(d) polycromosome
37. Chromosomes determining sex are called:
(a) Sex chromosomes✅
(b) Homologous chromosomes
(c) Heterologous chromosomes
(d) None
38. The trait for which gene is located on the x-chromosome is called:
(a) x-linked✅
(b) sex linked
(c) y-linked
(d) (a) and (b)
39. Alleles for colour blindness and hemophilia are present on:
(a) Autosomes
(b) Y-chromosome
(c) X-chromosome✅
(d) None
40. Haemophilia is also called:
(a) Women’s disease
(b) Male’s disease
(c) Bleeder’s disease✅
(d) All
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