PYQSide ExamsMy practice

Principles of Inheritance and Variation · Question 133

AIPMT 2004MCQEasy📈 Topic in 38% papers+4−1
1

Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to

  1. Linkage
  2. Recombination
  3. Repulsion
  4. Crossing over

Answer

(1) Linkage

Solution

As per NCERT, Morgan coined the term linkage to describe the physical association of genes on a chromosome.

⇒ Genes A and B present on the same chromosome tend to be inherited together, so they do not assort independently.

∵ Recombination and crossing over generate new (non-parental) combinations, i.e., they partly restore independent-looking assortment; repulsion is only an arrangement of linked alleles.

∴ Lack of independent assortment is due to linkage.

Answer: (1)

AIPMT 2004

Keep practising — Principles of Inheritance and Variation

2

One of the parents of a cross has a mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of F2 progenies that mutation is found in -

  1. 50% of the progenies
  2. 1/3 of the progenies
  3. None of the progenies
  4. All the progenies
AIPMT 2004
3

A normal woman, whose father was colour-blind is married to a normal man. The sons would be :-

  1. All colour-blind
  2. 75% colour-blind
  3. All normal
  4. 50% colour-blind
AIPMT 2004
4

The recessive genes located on X-chromosomes in humans are always -

  1. Expressed in females
  2. Sub-lethal
  3. Expressed in males
  4. Lethal
AIPMT 2004
5

After a mutation at a genetic locus the character of an organism changes due to the change in :-

  1. Protein synthesis pattern
  2. RNA transcription pattern
  3. DNA replication
  4. Protein structure
AIPMT 2004
6

In a mutational event, when adenine is replaced by guanine, it is a case of -

  1. Frameshift mutation
  2. Transition
  3. Transversion
  4. Transcription
AIPMT 2004
7

Which one of the following traits of garden pea studied by Mendel was a recessive feature?

  1. Green seed colour
  2. Green pod colour
  3. Axial flower position
  4. Round seed shape
AIPMT 2003
8

The genes controlling the seven pea characters studied by Mendel are now known to be located on how many different chromosomes?

  1. Six
  2. Seven
  3. Five
  4. Four
AIPMT 2003
9

Two crosses between the same pair of genotypes or phenotypes in which the sources of the gametes are reversed in one cross, is known as:

  1. Reciprocal cross
  2. Reverse cross
  3. Test cross
  4. Dihybrid cross
AIPMT 2003
10

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
AIPMT 2003
11

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
AIPMT 2003

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)