Growth and Development in Plants Set 6

All India Pre Medical Test (AIPMT)

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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Growth and Development in Plants Set 6

Q1 | Which type of dormancy, inhibits embryo growth and germination in seed ?
  • Endogenous dormancy
  • Physiological dormancy
  • External dormancy
  • Mixed dormancy
Answer: Physiological dormancy
Q2 | Which type of dormancy is found in seed causes physiology and external dormancy ?
  • Mixed dormancy
  • External dormancy
  • Physiological dormancy
  • Endogenous dormancy
Answer: Mixed dormancy
Q3 | What is the type of dormancy in which embryo do not differentiate into various tissue at the time offruit maturation ?
  • Internal dormancy
  • Physiological dormancy
  • External dormancy
  • Mixed dormancy
Answer: External dormancy
Q4 | During physiological and physical condition some changes observed in seed, is knows as ......
  • Exogenous dormancy
  • Endogenous dormancy
  • Combinational dormancy
  • Secondary dormancy
Answer: Combinational dormancy
Q5 | Which type of dormancy is induced in seeds due to adverse condition and high temperature ?
  • Exogenous dormancy
  • Endogenous dormancy
  • Combinational dormancy
  • Secondary dormancy
Answer: Secondary dormancy
Q6 | Genotype is
  • Genetic composition of many organisms.
  • Genetic composition of plastids.
  • Genetic composition of germ cells.
  • Genetic composition of an individual.
  • cessive
Answer: Genetic composition of many organisms.
Q7 | Mendelism is genetics of
  • Haploids
  • Diploids
  • Prokaryotes
  • All the above
  • cessive
Answer: All the above
Q8 | Which technique is used by Mendel for hybridization ?
  • Emasculation
  • Bagging
  • Protoplast fusion
  • Both A & B
  • cessive
Answer: Emasculation
Q9 | Phenotypic ratio 3:1 proves
  • Dominance
  • Segregation
  • Crossing over
  • Independent Assortment
  • cessive
Answer: Segregation
Q10 | What is the ratio of homozygous plants for both dominant characters in F2 of a Dilybrid cross ?
  • 16-Jan
  • 16-Mar
  • 16-Apr
  • 16-Sep
  • cessive
Answer: 16-Sep
Q11 | Which of the following is significance of dominance ?
  • Organisms with dominant genes are more vital
  • Harmful mutations are not expressed due to dominant gene
  • Heterosis is due to dominant gene
  • All the above
  • cessive
Answer: Harmful mutations are not expressed due to dominant gene
Q12 | From a single ear of corn, a farmer planted 200 kernels which produced 140 tall & 40 short plants. The genotypes of these off springs are most likely.
  • TT ,tt
  • TT , Tt , tt
  • TT ,Tt
  • Tt ,tt
  • cessive
Answer: TT ,tt
Q13 | A useful process for determining whether an individual is homozygous or heterozygous is
  • cross - breeding
  • self fertilization
  • Back - crossing
  • Test cross
  • cessive
Answer: self fertilization
Q14 | Heterozygous tall plants were crossed with dwarf plants what will be the ratio of dwarf plants in the following progency ?
  • 50%
  • 25%
  • 75%
  • 100%
  • cessive
Answer: 50%
Q15 | Genetic recombinations occur through
  • Mitosis & fertilization
  • Mitosis & Meiosis
  • Meiosis & fertilization
  • None
  • cessive
Answer: Meiosis & fertilization
Q16 | Which of the following is the unit of inheritance ?
  • Phenotype
  • Genotype
  • Gene
  • Genome
  • cessive
Answer: Gene
Q17 | Allele is the
  • Alternate trait of gene pair
  • Total number of genes for a trait
  • Total number of chromosomes
  • Total number of chromosomes of a haploid set.
  • cessive
Answer: Alternate trait of gene pair
Q18 | Types of phenotypes of F2 generation of dihybrid cross ?
  • 4
  • 16
  • 8
  • 9
  • cessive
Answer: 4
Q19 | Cross XXYy ? xxYy yields Xx YY:XxYy :Xxyy:xxyy offspring in the ratio of
  • 0 : 3 : 1 : 1
  • 1 : 2 : 1 : 0
  • 1 : 1 : 1 : 1
  • 1 : 2 : 1 : 1
  • cessive
Answer: 1 : 1 : 1 : 1
Q20 | Genes do not occur in pairs in
  • Zygote
  • Somatic cell
  • Endosperm cell
  • Gametes
  • cessive
Answer: Gametes
Q21 | Genotype - Phenotype concept was first produced by
  • Bateson
  • Johannsen
  • Sutton&Boveri
  • Punnet
  • cessive
Answer: Bateson
Q22 | 1: 1: 1: 1 ratio shows
  • Monohybrid cross
  • Dihybrid cross
  • Back cross
  • Dihybrid test cross
  • cessive
Answer: Dihybrid test cross
Q23 | Test cross is
  • Tt ? Tt
  • Tt ? TT
  • TT ? TT
  • Tt ? tt
  • cessive
Answer: Tt ? tt
Q24 | In a plant, gene "T" is responsible for tallness and its recessive allele "t" for dwarfness and "R" is reponsible for red colour flower and its recessive allele "r" of white flower colour. A tall and red flowered plant with genotype TtRr crossed with dwarf and red flowered ttRr. What is the percentage of dwarf - white flowered offspring of above cross ?
  • 50%
  • 6.25%
  • 12.50%
  • 50%
  • cessive
Answer: 12.50%
Q25 | In Mirabilis plant the appearance of the pink hybrid (Rr) between cross of a red (RR) and white (rr) flower parent indicates
  • Segregation
  • Dominance
  • Incomplete dominance
  • Heterosis
  • cessive
Answer: Incomplete dominance
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