The gene ftsZ plays a central role in division.

Mutations in ftsZ block septum formation and generate filaments.

Overexpression induces minicells by causing an increased number of septation events per unit cell mass.

FtsZ (the protein) recruits a battery of cell division proteins that are responsible for synthesis of the new septum.

TLS Online TPP Program

#Id: 6274

#Unit 8. Inheritance Biology

Dominant recessive epistasis (13:3) Pigmentation in paddy rice

P  = purple

              pp=green

              I   =inhibitory gene

              PpIi × PpIi

                       

              P_I_=9  green

              P_ii = 3 purple

              ppI_=3  green

              ppii =1  green

TLS Online TPP Program

#Id: 6275

#Unit 8. Inheritance Biology

Duplicate Dominant gene interaction (15:1) When dominant allele of both gene loci produce  the same phenotype without cumulative effect.

TLS Online TPP Program

#Id: 6276

#Unit 8. Inheritance Biology

Duplicate gene interaction occurs in shepherds purse plant. 

op                                           tringular

                 A

                                                                                                     Tringular         

Top                                    tringular   

TLS Online TPP Program

#Id: 6277

#Unit 8. Inheritance Biology

Polymeric Gene interaction (9:6:1) The combination of two dominant alleles that intensifies the phenotype or creates a median variation. 

Long                                          circular

                        A                                                                     

                                                                                           Disc shape

                       

Long                                                    circular

                         B  

 

TLS Online TPP Program

#Id: 6326

#Unit 8. Inheritance Biology

Sex determination, sex linkage, sex limited, and sex influenced characters) & Extra chromosomal inheritance

1. Sex-determining mechanisms include,

1. Chromosomal

2. Genic

3. Environmental

TLS Online TPP Program

#Id: 6327

#Unit 8. Inheritance Biology