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Complimentary genes
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Dr Praveen Kumar Agrawal is teaching live on Unacademy Plus

Dr Praveen Kumar Agrawal
Ex - Faculty, Allen Kota, 22 Yrs Experience. Author - 17 books Known for best explanation Youtube : Concept Gurukul

U
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Plz upload mcq lecture with solutions on this chapter... We need lott of practice otherwise whatever u teached will vanish from our mind!!
NK
Sir what is supplementary genes.
sir your extracts (notes ) are from whick book?? please reply sir......🤤
sir your extracts (notes ) are from whick book?? please reply sir......🤤
sir your extracts (notes ) are from whick book?? please reply sir......🤤
  1. COURSE Principles of inheritance and variations Lesson 14 Complimentary genes Dr. Praveen Kumar Agrawal M.Sc., Ph.D., CSIR NET (JRF). SRF, GATE 21Years of Pre-medical teaching experience


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  3. COMPLEMENTARY GENES Complementary genes are two pairs of non-allelic genes (present on separate loci), which together produce a phenotypic character. Dominant alleles (atleast one) of both genes is required for the expression of the character i.e., the character would appear only if the dominant alleles of both the genes are present. It means both genes are complementary to each other. For example, in 'sweet pea' (Lathyrus odoratus), the pink colour of flower depends upon the presence of two pairs of non-allelic genes. The pink colour appears only when the dominant alleles of both genes are present. If dominant allele of any one gene is missing, colour does not appear and white flower is produced.


  4. Pure pinlk PPSS ppss Pure white PSPS ps ps F1 PpSs Pps PpSs All individuals are pink


  5. Selfing of F1 PpSs PpSs Male Female PS PPSS Pink ps ps PPSs PpSS Pink PpSs PS Pink Pink PPSs PPss PpSs Pink Ppss White Pink White PpSS PpSs ppSS ppSs ps Pink Pink White White PpSs Ppss White ppSs White ppss White ps Pink


  6. Results Phenotypic ratio 9:7 (Pink 9, White 7) It is clear from the above figure, that for the appearance of pink flower, the dominant alleles of both genes are necessary. Thus, both genes are complementary to each other. None of these can alone produce the character.


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