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Principles of Inheritance and Variation

Previous year questions with solutions · 2000 – 2026

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168Questions
34Papers covered
8.91%Weightage 2026▲ 60.4% vs last year
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Year-wise statistics questions · papers · average per paper · weightage
YearQuestionsPapersAvg / paperWeightage
2026924.58.91% ▲ 60.4% vs last year
20253135.56% ▼ 47.2% vs last year
2024122610.53% ▲ 32.6% vs last year
20235157.94% ▼ 13.4% vs last year
202212269.16% ▲ 174.8% vs last year
20212123.33% ▼ 58.3% vs last year
20204148.00% ▼ 15.2% vs last year
20195159.43% ▲ 29.7% vs last year
20184147.27% ▼ 17.1% vs last year
20175158.77% ▲ 12.1% vs last year
2016924.57.83% ▲ 42.2% vs last year
20156235.50% ▼ 23.6% vs last year
20138247.21% ▲ 48.5% vs last year
2012522.54.85% ▲ 16.5% vs last year
20114224.17% ▼ 58.3% vs last year
2010924.510.00% ▲ 40% vs last year
20094147.14% ▲ 96.4% vs last year
20082123.64% ▼ 62.9% vs last year
20075159.80% ▼ 35.7% vs last year
200691915.25% ▲ 20.1% vs last year
200581812.70% ▼ 12.7% vs last year
200481814.55% ▲ 12.7% vs last year
200381812.90% ▲ 3.2% vs last year
200281812.50% ▼ 18.1% vs last year
200191915.25% ▲ 64.7% vs last year
20005159.26%

⚠ 1 of these questions are out of the current syllabus (marked on the question).

163 questions · newest paper first · page 6 of 6

Ques. 151AIPMT 2001

A and B genes are linked. What shall be genotype of progeny in a cross between AB/ab and ab/ab?

  1. AABB and aabb
  2. None
  3. AaBb and aabb
  4. AAbb and aabb
Ques. 152AIPMT 2001

When dominant and recessive alleles express themselves together it is called

  1. Dominance
  2. Pseudo dominance
  3. Co-dominance
  4. Amphidominance
Ques. 153AIPMT 2001

Ratio of complementary genes is

  1. 9 : 3 : 4
  2. 9 : 7
  3. 12 : 3 : 1
  4. 9 : 3 : 3 : 4
Ques. 154AIPMT 2001

Independent assortment of genes does not take place when

  1. Genes are located on non-homologous chromosomes
  2. Genes are linked and located on same chromosome
  3. Genes are located on homologous chromosomes
  4. All the above
Ques. 155AIPMT 2001

Sickle cell anaemia is due to

  1. Change of amino acid in either or chain of haemoglobin
  2. Change of amino acid in chain of haemoglobin
  3. Change of amino acid in both and chain of haemoglobin
  4. Change of amino acid in chain of haemoglobin
Ques. 156AIPMT 2001

Number of Barr bodies in XXXX female is

  1. 3
  2. 1
  3. 2
  4. 4
Ques. 157AIPMT 2001

Male XX and female XY sometime occur due to

  1. Aneuploidy
  2. Deletion
  3. Transfer of segments in X and Y chromosomes
  4. Hormonal imbalance
Ques. 158AIPMT 2001

Probability of four sons to a couple is : -

  1. 116
  2. 18
  3. 14
  4. 132
Ques. 159AIPMT 2000

Due to the cross between TTRr × ttrr the resultant progenies showed how many percent plants tall, red flowered:

  1. 50%
  2. 100%
  3. 75%
  4. 25%
Ques. 160AIPMT 2000

According to mendelism which character is showing dominance?

  1. Green colour in seed coat
  2. Wrinkled seed
  3. Terminal position of flower
  4. Green pod colour
Ques. 161AIPMT 2000

Mongolian idiots are due to trisomy in 21st chromosome is called:

  1. Klinefelter's syndrome
  2. Down's syndrome
  3. Turner's syndrome
  4. Triplex syndrome
Ques. 162AIPMT 2000

Erythroblastosis foetalis is caused when:

  1. Rh- female & Rh+ male
  2. Rh- female & Rh- male
  3. Rh+ female & Rh+ male
  4. Rh+ female & Rh- male
Ques. 163AIPMT 2000

In Drosophila the XXY condition leads to femaleness whereas in human beings the same condition leads to Klinefelter's syndrome in male. It proves:

  1. Y chromosome is active in sex determination in both human beings and Drosophila
  2. In Drosophila Y-chromosome decides femaleness
  3. Y chromosome of man have genes for syndrome
  4. In human beings Y chromosome is active in sex determination