Atomos Test Generator Free PYQs ExamsMy practice Log in / Sign up free

Principles of Inheritance and Variation

AIPMT 2003MCQMedium📈 Topic in 25% papers+4−1
Ques. 1AIPMT 2003

Pattern baldness, moustaches and beard in human males are examples of:

  1. Sex limited traits
  2. Sex influenced traits
  3. Sex determining traits
  4. Sex linked traits

Answer

(2) Sex influenced traits

Solution

Sex-influenced traits are controlled by autosomal genes whose expression depends on the sex hormones of the individual.

⇒ The allele for pattern baldness behaves as dominant in males (high testosterone) and recessive in females, so it is far more common in men; growth of moustaches and beard similarly depends on male hormones.

∴ These are sex-influenced traits (autosomal genes, not X-linked genes).

Answer: (2)

Keep practising — Principles of Inheritance and Variation

Ques. 2AIPMT 2003

Which one of the following conditions though harmful in itself, is also a potential saviour from a mosquito borne infectious disease?

  1. Pernicious anaemia
  2. Thalassaemia
  3. Leukemia
  4. Sickle cell anaemia
Ques. 3AIPMT 2003

Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder?

  1. 50%
  2. 100%
  3. 75%
  4. 25%
Ques. 4AIPMT 2003

In Drosophila, the sex is determined by:

  1. X and Y chromosomes
  2. Whether the egg is fertilized or develops parthenogenetically
  3. The ratio of number of X-chromosomes to the sets of autosomes
  4. The ratio of pairs of X-chromosomes to the pairs of autosomes
Ques. 5AIPMT 2003

Christmas disease is another name for :-

  1. Hepatitis B
  2. Sleeping sickness
  3. Haemophilia B
  4. Down's syndrome
Ques. 6AIPMT 2002

Which of the following is the example of pleiotropy ?

  1. Thalassemia
  2. Haemophilia
  3. Sickle cell anaemia
  4. Colour blindness
Ques. 7AIPMT 2002

There are three genes a, b and c. The percentage of crossing over between a and b is 20%, b and c is 28% and a and c is 8%. What is the sequence of genes on chromosome?

  1. a, b, c
  2. b, a, c
  3. a, c, b
  4. None
Ques. 8AIPMT 2002

On selfing a plant of F1 generation with genotype “AABbCC”, the phenotypic ratio in F2 generation will be

  1. 1 : 1
  2. 3 : 1
  3. 9 : 3 : 3 : 1
  4. 27 : 9 : 9 : 9 : 3 : 3 : 3 : 1
Ques. 9AIPMT 2002

A gene is said to be dominant if : -

  1. It is expressed only in heterozygous condition
  2. It expresses its effect only in homozygous stage
  3. It is never expressed in any condition
  4. It is expressed both in homozygous and heterozygous condition
Ques. 10AIPMT 2002

A diseased man marries a normal woman. They get three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this disease is : -

  1. Sex linked dominant
  2. Autosomal dominant
  3. Sex linked recessive
  4. Sex limited character
Ques. 11AIPMT 2002

Which of the following is a correct match -

  1. Sickle cell anaemia = X – Chromosome
  2. Down Syndrome = 21st Chromosome
  3. Haemophilia = Y – Chromosome
  4. Parkinson Disease = X & Y Chromosome

All Principles of Inheritance and Variation PYQs →

PDFDownload Principles of Inheritance and Variation PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)