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Multiple Choice Questions on Genetics


1. The smallest unit of genetic material which when mutated produces a phenotypic effect is:
a) Recon
b) Muton
c) Gene
d)  Nucleic acid

2. Alleles are
a)  Linked genes
b) Alternative forms of a gene
c) Homologous chromosomes
d) Chromosome that have crossed over

3. An organism with two identical allele of a gene in a cell is called:
a) Homozygous
b) Heterogeneous
c)  Hybrid
d) Dominant

4. Genes do not occur in pairs in
a) Body cells
b) Gametes
c)  Fertilized egg
d) Zygote

5. When a cross is made between offspring and its parent, it is called:
a) Back cross
b) Intergeneric cross
c)  Interspecific cross
d)  Back cross

6.  When a heterozygous offspring is crossed with homozygous recessive parent, it is called:
a) Test cross
b) Reciprocal cross
c) Monohybrid cross
d)  Dihybrid cross

7. The term genome is used for
a) Haploid set of a chromosome
b) Diploid set of chromosome
c)  Polyploid set of chromosome
d)  Triploid set of chromosome

8. The process of removing stamens from the flower during hybridization is called
Emasculation

a) Caping
b) Selfing
c) Crossing
d)  Emasculation

9. Mendel choose pea plants for his experiments because
a) They were having contrasting characters
b) They were cheap
c) They were easily available
d) All of the above

10. The main reason for the success of Mendel was that
a) He selected pea plant
b) He kept pedigree record
c)  He made statistical analysis of the offspring
d)  He first took only one character at a time in his crosses.

Answers:
  1. a) Recon
  2. b) Alternative forms of a gene
  3. a) Homozygous
  4. b) Gametes
  5. d)  Back cross
  6. a) Test cross
  7. b) Diploid set of chromosome
  8. d)  Emasculation
  9. a) They were having contrasting characters
  10. d)  He first took only one character at a time in his crosses.
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