Chapter 17 Genes and Inheritance solved mcqs

41. In 1991 male determining gene ___ was discovered on y-chromosome.

(a) SRY✅

(b) SSy  

(c) CIT 

(d) CAT  

42. The phenotypic ratio of F\(_2\) generation in law of independent assortment is:

(a) 3:1 

(b) 9:3:2:1✅ 

(c) 9:3:3:2 

(d) 9:3:3:1  

43. A cross during which inheritance of two traits is studied at a time is:  

(a) Monohybrid 

(b) Dihybrid✅

(c) Both a and b 

(d) None  

44. The offspring's of two true breeding parents are named by Mendal as:  

(a) F\(_1\) or first filial generation✅  

(b) F\(_2\) or second filial generation  

(c) F\(_3\) or 3rd filial generation  

(d) None  

45. The trait which appeared in F\(_1\) generation was named by Mendal as:

(a) Recessive 

(b) Healthy  

(c) Dominant✅

(d) all  

46. The trait which was hidden in F\(_1\) generation named as:  

(a) Homozygous 

(b) Recessive✅

(c) Super 

(d) Unfit  

47. When both alleles of a gene pair in an organism are same, the gene pair is said as:

(a) Homozygous✅

(b) Heterozygous  

(c) Heptozygous 

(d) All above  

48. When both genes of an allele pair are different, the organism is ___ for that pair:

 

(a) Heterozygous✅

(b) HemozygousHemozygous

(c) Multizygous

(d) None

49. An individual with a heterozygous genotype is called:

(a) Homozygous 

(b) Heterozygous✅

(c) Homozygote 

(d) Heterozygote  

50. "Two coexisting alleles of an individual for each trait

segregate during gamete formation, so that each  

gamete get are of the two alleles" this is called,  

(a) Law of independent assortment  

(b) Law of segregation✅  

(c) Law of unification  

(d) Law of inheritance  

51. DNA consists of:

(a) Nucleotides✅

(b) Neocleotide  

(c) Nucleus 

(d) Dexoxyribose  

52. Nucleotide consists of:

(a) Nitrogenous base  

(b) Phosphate group  

(c) 5-C sugar  

(d) All above✅

53. Which is the heredity material:

  

(a) DNA✅

(b) ribosomes  

(c) Proteins 

(d) Nucleus  

54. Watson and Crick revealed structure and replica  

of:  

(a) DNA✅

(b) RNA  

(c) Ribosome 

(d) Nucleus  

55. Which has made possible to bring desirable change in animals and plants:  

(a) Genetic engineering  

(b) Recombinant DNA technology✅ 

(c) Biochemistry  

(d) None

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Biology Chapter 17 Genes and Inheritance solved mcqs

 1. After the process of meiosis the nucleus of the cell contain ______ number chromosomes:

(a) Haploid✅

(b) Diploid

(c) Triploid    

(d) Polyploid

2. Nucleus of the cell contains genes which are located on:

(a) Nuclear membrane

(b) Necloelus

(c) Chromosomes✅

(d) Nuclear fluid

3. An adult female animal has 48 chromosomes. How many chromosomes will be found in its gamete cell.

(a) 12    

(b) 24✅

(c) 48    

(d) 72

4. Genes affecting the same character, are located on the same position in homologous chromosomes and are called:

(a) Autosomes    

(b) Alleles✅

(c) Loci    

(d) Chromatids

5. The number of autosomal chromosomes present in the fruit fly are:

 

(a) 2    

(b) 3

(c) 6✅

(d) 8

6. Which of the following base pairing is correct:

(a) Adenine with cytosine (AC)

(b) Adenine with guanine (AG)

(c) Cytocine with guanin (CG)✅

(d) Thiamine with cytosine (CT)

7. Genes responsible for colour blindness are located on:

(a) X-chromosomes    

(b) Y-chromosomes✅

(c) Autosomal chromoses

(d) Both on X and Y

8. ______ to transmit biological information

(a) gene✅

(b) Chromosomes

(c) Gametes

(d) Nuclear

9. What is 2n number of chromosomes in man

(a) 46✅

(b) 14

(c) 8    

(d) 26

10. Appearance of trait in an individual is its:

(a) Genotype    

(b) Phenotype✅

(c) Kanyotype    

(d) Genome

11. Crossing over takes place between:

(a) Homologous chromosomes✅

(b) Heterologous chromosomes

(c) Chromatids

(d) Sister chromosomes

12. What condenses into a chromosome.

(a) Nucleoplasm 

(b) Nucleolus

(c) Chromatic material✅

(d) Cytoplasm

13. Chromatin consists of:

(a) Proteins    

(b) DWA and proteins✅

(c) DNA 

(d) RNA

14. What is the backbone of DNA

(a) Phosphate 

(b) Drosyribose

(c) Nitrogenous 

(d) Phosphate + drosyribose✅

15. ______ is not found in DNA.

(a) Thymine 

(b) Ademine

(c) Uracil✅

(d) Guanine

16. In DNA, guanine pairs up with:

(a) Thymine 

(b) Ademine

(c) Uracil 

(d) Cytosine✅

17. Only RNA contains:

(a) Uracil 

(b) ribose

(c) Deoxyribose 

(d) Ribose and uracil✅

18. Mendels worked on how many contrasting pairs of traits.

(a) 5 

(b) 7✅

(c) 10 

(d) 14

19. An individual with a heterozygous genotype is a:

(a) Heterozygote 

(b) Hybrid✅

(c) Homozygote 

(d) Hemizygote

20. The phenomenon of staying together of all the genes of a chromosome is called:

(a) Genotype 

(b) Linkage✅

(c) Mutant 

(d) none of them

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