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Biology 12 Principles Of Inheritance And Variation : Practice MCQs from Principles Of Inheritance And Variation from this post and score full marks in this chapter. These important MCQs on Principles Of Inheritance And Variation are prepared keeping in mind the latest pattern of Board examination.
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Biology 12 Sexual Reproduction In Flowering Plants MCQ Question Answer – Chapter 2
Biology 12 Human Reproduction MCQ Question Answer – Chapter 3
Biology 12 Principles Of Inheritance And Variation – Chapter 5
Ques 1: Theory of pangenesis was forwarded by
- Charles Darwin
- Gregor Johann Mendel
- Hugo de Vries
- Sutton and Boveri
Water hyacinth
Ques 2: Cross which involves the same traits but carried by sexes opposite to those in the original cross in termed
- Test cross
- Back cross
- Reciprocal cross
- Monohybrid cross
Reciprocal cross
Ques 3: A pure tall pea plant chosen by mendel for cross breeding had the height of:
- 22-44 cm
- 44-66 cm
- 66-99 cm
- 100-120 cm
100-120 cm
Ques 4: Phenotypic ratio of 1 : 2 : 1 in F2 generation was observed in
- Mendel’s monohybrid cross
- Blended inheritance
- Quantitative inheritance
- Codominance
Blended inheritance
Biology MCQs Principles of Inheritance and Variation Class 12
Ques 5: ABO blood group in humans is an example of
- Dominance
- Codominance
- Multiple alleles
- All of these
All of these
Ques 6: Phenotypic traits which show a wide spectrum of phenotypes which imperceptibly blend from one condition to another as continuous variations are called
- Qualitative traits
- Quantitative traits
- Dominant traits
- Recessive traits
Quantitative traits
Ques 7: The prevention of the expression of one pair of genes by another pair of genes in termed
- Epistasis
- Hypostasis
- Incomplete dominance
- Linkage
Epistasis
Ques 8: Who showed that genes are carried on chromosomes ?
- Mendel
- Johannsen
- Morgan
- Sutton and Boveri
Morgan
Ques 9: Name the disorder in humans having the karyotype 22 pairs of autosomes and XO.
- Klinefelter syndrome
- Down syndrome
- Turner syndrome
- Albinism
Turner syndrome
Principles of Inheritance and Variation MCQs With Solutions
Ques 10: Which of the following has 22 pairs of autosome + 21st chromosome + XY ?
- Down syndrome
- Turner syndrome
- Klinefelter syndrome
- Immune deficiency syndrome
Down syndrome
Ques 11: Name the pattern of inheritance where F1 phenotype does not resemble either of the two parents and is in between the two.
- Mendel’s monohybrid cross
- Epistasis
- Blended inheritance
- Quantitative (polygenic) inheritance
Blended inheritance
Ques 12: Systematized representation of the chromosome complement of a cell or organism depicting the characteristics of the chromosomes as seen in metaphase of mitosis is termed
- Genotype
- Karyotype
- Phenotype
- Phenocopy
Karyotype
Ques 13: Deletion of half of short arm of chromosome 5 in humans results is which disorder ?
- Monogolism
- Cri-du-chat syndrome
- Chronic myloid leukemia
- Turner syndrome
Cri-du-chat syndrome
Ques 14: The mutations, which alter the entire reading frame of the message, are called
- Point mutations
- Mutons
- Frameshift mutations
- none of these
Frameshift mutations
Principles of Inheritance and Variation MCQ Questions with Answers
Ques 15: ZW. ZZ type of sec determination is seen in
- Drosophila
- Humans
- Bonellia
- fishes, reptiles and birds
fishes, reptiles and birds
Ques 16: A dihybrid cross, revealing complete linkage, depicted genotypes in F2 generation in the ration of:
- 9 : 3 : 3 : 1
- 7 : 1 : 1 : 7
- 1 : 1
- 3 : 1
1 : 1
Ques 17: Mendel’s law of independent assortment holds good for genes situated on the:
- Homologous chromosomes
- non-homologous chromosomes
- same chromosome
- mutated chromosomes
non-homologous chromosomes
Ques 18: If both the parents are carriers for thalassemia disorder (autosomal recessive). What are the chances of pregnancy resulting in affected child ?
- 50%
- 25%
- 100%
- No chance
25%
Ques 19: Which is a mismatch ?
- T.H. Morgan-Linkage
- ABO blood group – Codominace
- Trisomy of 21st chromosome – Turner syndrome
- Multations – Gamma radiations
Trisomy of 21st chromosome – Turner syndrome
Biology 12 MCQ Test Principles Of Inheritance And Variation
Ques 20: Down syndrome is due to
- Linkage
- Sex-linked inheritance
- Crossing over
- Non-disjunction of chromosome
Non-disjunction of chromosome
Ques 21: X-linked recessive gene is
- always expressed in male
- always expressed in female
- lethal
- sub-lethal
always expressed in male
Biology 12 Reproductive Health MCQ Question Answer – Chapter 4
Biology 12 Principles of Inheritance and Variation Chapter 5
Biology 12 Environmental Issues Chapter 15 – Exercise
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