Incomplete Dominance Examples

, , No Comments


Incomplete Dominance in Mirabilis Jalapa

Also Known as: Four O'Clock Flower, or 'Marvel of Peru'

P-Generation: Red (RR) X White (rr)
F1 (first filial) Generation: Pink (Rr)
F2 Generation: 1 Red (RR) : 2 Pink (Rr) : 1 White (rr)
F2 Phenotypic Ratio: 1 : 2 : 1

P-GenerationBack-Cross - Pink (Rr) X Red (RR)
F2 Generation: 1 Red (RR) : 1 Pink (Rr)
F2 Phenotypic Ratio: 1: 1

P-GenerationBack-Cross (Test Cross) - Pink (Rr) X White (rr)
F2 Generation: 1 Pink (Rr) : 1 White (rr)
F2 Phenotypic Ratio: 1: 1

Free Download ZoomGenetics Software (For Windows)
Practice Free MCQs: Free MCQs and Pictures


Other Examples of Incomplete Dominance

Male ParentFemale ParentResulting Phenotype
Mirabilis JalapaRed FlowerWhite FlowerPink Flower
Snapdragon
(Antirrhinum majus)
Red FlowerWhite FlowerPink Flower
RabbitRed FurWhite FurBrown Fur
HumanCurly HairStraight HairWavy Hair
Andalusian FowlBlackWhiteBlue
Carnation
(Dianthus Caryophyllus)
RedWhitePink
SheepBlackWhiteGrey
HorseTallShortMedium stature
American BulldogBigSmallMedium-sized
Blahblah birdBlueWhiteSilver
DogLong hairedShort hairedMedium length hairs
RatBrownWhiteMixed colored
HumansLarge Lip ProtrusionSmall Lip ProtrusionAverage Lip Protrusion
HumansHigh pitched voiceLow pitched voiceMedium pitched voice
TulipRedWhitePink
CatHighly spottedNo spotsSome spots
HumansBig HandsSmall handsAverage sized hands
BirdRedBluePurple
Tay-Sach's disease: Genes which creates antibodies only creates half the necessary antibodies causing Tay-Sach's disease.

Multiple Choice Questions

Mirabilis Jalapa (4 O`clock flower) and Snapdragon (Antirrhinum majus) shows the following:
(1) Complete Dominance
(2) Incomplete Dominance
(3) Co-Dominance
(4) Multiple Allele

Ans: http://zoomgenetics.apphb.com/?id=m6

What are exceptions to Mendel`s law of dominance?
(1) Incomplete dominance
(2) Co-dominance
(3) both
(4) none

Ans: http://zoomgenetics.apphb.com/?id=m21

Who discovered Incomplete dominance and Cytoplasmic dominance
(1) Carl Correns
(2) Regnier de Graaf
(3) Carl Wilhelm von Nageli
(4) Archibald Garrod

Ans: http://zoomgenetics.apphb.com/?id=m28

A phenotypic ratio in F2, of 1 : 2 : 1  is indicative of the gene-interaction, _______
(1) Complete dominance
(2) Incomplete dominance
(3) Recessive Epistasis
(4) Supplementary gene

Ans: http://zoomgenetics.apphb.com/?id=m521

ZoomGenetics is a software for learning genetics for students preparing for AIPMT, AIIMS, JIPMER, PMT and other medical entrance exams. Zoom Genetics covers a major portion of about 25 to 30% of the syllabus of Biology for the students preparing for Medical Entrance Examination.

The unique features are zooming user interface, extensive graphics, bulleted notes, easy to understand description, info-graphics, memory techniques, and extensive multiple choice questions.

Free Download:  ZoomGenetics Software (For Windows) to "Boost your Biology" Score in Medical Entrance Exams.

0 comments:

Post a Comment