PYQSide ExamsMy practice

Principles of Inheritance and Variation · Question 164

AIPMT 2000MCQEasy📈 Topic in 38% papers+4−1
1

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%

Answer

(1) 50%

Solution

Consider each gene separately (independent assortment).

Height: TT tt ⇒ all Tt ⇒ tall = 1

Flower colour: Rr rr ⇒ 12 Rr (red) : 12 rr (white) ⇒ red = 12

∴ Tall, red-flowered plants = 1 12 = 12 = 50\%

Answer: (1)

AIPMT 2000

Keep practising — Principles of Inheritance and Variation

2

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
AIPMT 2000
3

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
AIPMT 2000
4

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
AIPMT 2000
5

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
AIPMT 2000

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)