Biology Chapter 17 Genes and Inheritance important mcqs solved

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

➡ Next MCQs Page

Biology chapter 16 Reproduction mcqs solved

41. The types of vegetative propagation in plants are:

    

(a) by leaves    

(b) by roots

(c) by stem    

(d) by seeds

(e) all of them✅

42. The methods of artificial vegetative propagation are:

(a) graftings    

(b) cutting

(c) underground stem  

(d) all of them✅

43. A type of artificial vegetative propagation in which individuals are produced from single parent with identical properties as in parent is called:

    

(a) cloning✅

(b) Cutting

(c) grafting    

(d) underground stem

44. As a result of double fertilization, fusion nucleus give rise to:

    

(a) Fruit    

(b) Seeds

(c) Water storing tissue 

(d) Food storing tissue✅

45. Parthenocarpic fruits may be formed by the ovary in which no ______ occurs:

(a) Fertilization✅

(b) Pollination

(c) Development    

(d) None of these

46. In rhizopus, sporangium containing spores are produced or born:

(a) On filaments

(b) On the tips of sporangiopheres✅

(c) On the stolon hyphae

(d) On rhizoids

47. Each spore when exposed to suitable conditions form new:

(a) mycelium✅

(b) sporangiopores

(c) stolon hyphae    

(d) None of them

48. Method of vegetative propagation in plants are:

(a) By seeds    

(b) By stem

(c) By roots    

(d) All of them✅

49. The example of a plant showing vegetative propagation by leaf is:

(a) Grasses    

(b) Bryophyllum✅

(c) Banana    

(d) strawberry

50. Flowers spread through wind pollination are usually:

(a) produce nectar

(b) lighter in weight

(c) with long feathering stigma

(d) a, b and c✅

51. The examples of flowers showing pollination through water are:

(a) Potamogeton    

(b) Coconut✅

(c) Vallisneria    

(d) None of these

52. After fertilization ___ developed into seed:

(a) Ovary    

(b) Stigma

(c) Ovule✅

(d) Egg

53. The plants in which seeds and fruits are dispersed by wind are:

(a) Grasses    

(b) Bombax

(c) Calotropis    

(d) All of them✅

54. The dispersal of seed by water occurs in plants:

(a) Lotus    

(b) Daffodils

(c) Coconut    

(d) All of them✅

55. The dome shape wall in the sporangium present in center is called:

(a) peripheral wall    

(b) Columella✅

(c) Central swelling    

(d) None of them

56. In the grain of maize, the cotyledon is modified into an organ called:

(a) Shield    

(b) Scutellum✅

(c) Endosperm    

(d) All of them

➡ Next MCQs Page

Biology chapter 16 Reproduction important mcqs

21. Fertilization in flowering plants is called double fertilization because:

(a) One tube nucleus fuses with one egg and one sperm nucleus fuses with another egg.

(b) One sperm nucleus fuses with egg and another sperm nucleus fuses with fusion nucleus.✅

(c) Two sperm nuclei fuses with one egg.

(a) None of the above  

22. In peach, the fruit is derived from the:  

(a) Megaspores 

(b) Endospores✅

(c) Walls of the ovary 

(d) Petals 

 

23. The nucleus of the egg is located in the:  

(a) Vegetal hemisphere 

(b) Animal hemisphere✅

(c) Equator 

(d) Middle  

24. In plants the gametophytes produce egg and sperm by:  

(a) Meiosis✅

(b) Mitosis  

(c) Spore formation 

(d) Fertilization

  

25. If you found a dark, rotten smelling flower near the ground it would most likely be pollinated by:  

(a) Bats 

(b) Beetles  

(c) Moths✅

(d) Bees  

26. The intestine of frog develops from:  

(a) Endoderm✅

(b) Mesoderm  

(c) Ectoderm 

(d) None of the above  

27. Two main types of reproduction are:  

(a) Sexual 

(b) Binary fission  

(c) Asexual 

(d) Both a and c✅

28. Fruits and seeds helps in:  

(a) Dispersal of plants 

(b) dispersal of food  

(c) Dispersal of species 

(d) All of the above✅

 

29. The rapid cell division of the zygote which results in the development of morula is:  

(a) cleavage✅

(b) modulation  

(c) gastrulation 

(d) all of them  

30. The process by which a tadpole changes into a frog is called:  

(a) Growth 

(b) Development  

(c) Metamorphosis✅

(d) a and b

31. The stage of development of frog zygote, during which ball of cells contains a cavity blastocoel is called:

(a) Blastulation✅

(b) Gastrulation

(c) Archenteron    

(d) Any of them

32. In frog fertilization is ______ and occurs:

(a) Internal and on ground

(b) External and on pasture

(c) External and in the water✅

(d) None of them

33. As soon as the nervous system is formed, the embryo becomes:

(a) Morula    

(b) Blastula

(c) Gastrula    

(d) Neurula✅

34. Reproduction is a biological process leading to production of:

   

(a) New species,    

(b) New genera

(c) New individuals of one's own kind✅

(d) None of the above

35. Two types of seed germination are:

   

(a) Hypogeal    

(b) Epigeal

(c) Stapgeal    

(d) Both a and b✅

36. Necessary conditions for seed germination are:

(a) Water and air    

(b) Viability of seed

(c) Suitable temperature 

(d) All of these✅

37. In Animals the process of formation of sperm is called:

(a) Spermatogenesis✅

(b) Oogenesis

(c) Gluconeogenesis    

(d) None of the above

38. In plants pollination plays an important role during:

(a) Parthenogenesis

(b) Sexual reproduction✅

(c) A-Sexual reproduction

(d) None of trhizoids

39. Different types of sexual reproduction are:

(a) Binary fission    

(b) Multiple fission 

(c) Spore formation 

(d) None of them✅

40. Process of asexual reproduction which involves the vegetative parts of flowering plants is called:

(a) Vegetative propagation 

(b) Parthenogenesis 

(c) Asexual reproduction    

(d) all of them✅

➡ Next MCQs Page

Biology chapter 16 Reproduction sloved mcqs

1. The plumule of embryo give rise to the:

(a) Primary stem✅

(b) Secondary root

(c) Roots

(d) All of these

2. The embryos usually consists of:

(a) Seeds leaves

(b) Epicotyle

(c) Cotyledons and hypocotyle

(d) All of them✅

3. When the cotyledons appear above the ground by elongation of hypocotyls, this germination is:

(a) Hypogee

(b) Epigeal✅

(c) Intergeal

None of them

4. Germination of seeds occur over a wide range of temperature between:

(a) 5C-15C

(b) 5C-35C✅

(c) 10C-20C

(d) 5C-35C

5. The events which are involved in the germination of an adult from a fertilized egg are called:

(a) Reproduction

(b) Growth

(c) Development✅

(d) None of them

6. The embryo develops into a new individual through:

(a) Growth  

(b) Cell division  

(c) Differentiation  

(d) All of the above✅

7. When fusion of male and female gametes takes place inside the body of female is called:  

(a) Fertilization  

(b) Internal fertilization✅

(c) Inward fertilization  

(d) Safe fertilization  

8. The mesoderm from behind the dorsal lip give rise to the:

(a) Somites  

(b) Nephrostome  

(c) Notochord✅

(d) Gut  

9. The gametophyte generation produces gametes by the process of:  

(a) Meiosis✅

(b) Binary fission  

(c) Vegetative propagation  

(d) Mitosis  

10. Gastrula is characterized by the formation of:

(a) Three germinal layers✅

(b) Gut  

(c) Nervous system  

(d) All of them  

11. The portion of the embryo below the point of attachment of cotyledons to the embryo axis is called:  

(a) Radical  

(b) Epicotyl  

(c) Hypocotyl✅

(d) Plumule  

12. The first structure emerging from germination of seed and growing rapidly is:

(a) Root  

(b) Leaves  

(c) Stem✅

(d) All of them  

13. When the cotyledons remains below the soil and epicotyl elongates, this type of germination is called:  

(a) Supergeal  

(b) Hypogeal✅

(c) Intergeal  

(d) Digeal  

14. Type of reproduction which does not involve fusion of gametes is called:

(a) Asexual✅

(b) Sexual

(c) Parthenogenesis 

(d) None of them

15. The eggs are produced in thin walled sacs called:

(a) Ovaries✅

(b) Testes

(c) Hemispheres 

(d) None of them

16. If the fusion of male and female gametes takes place outside the body it is called:

(a) Pollination 

(b) External fertilization✅

(c) Internal fertilization 

(d) Fertilization

17. The cells along the margins of the blastopore move inward to form the:

(a) Ectoderm 

(b) Endoderm

(c) Mesoderm 

(d) Both (a) and (b)✅

18. Neural with the formation of gills and tails develops into:

(a) Neurula 

(b) Tadpole

(c) Morula ✅

(d) None of them

19. In the life history of flowering plant the generations are:

(a) Gametophyte ✅

(b) Sporophyte

(c) Tracheophyte 

(d) Both b and c

20. The bee picks up pollen from the --- of flower and carries it to another flower:

(a) Ovary 

(b) Stigma

(c) Anther ✅

(d) Sepals

➡ Next MCQs Page