Cytokinin biosynthesis, catalyzed by isopentenyl transferase (IPT), is the addition of the isopentenyl side chain from DMAPP (dimethylallyl diphosphate) to an adenosine moiety (ATP or ADP). iPRTP or iPRDP is converted to ZTP or ZDP respectively by cytochrome P450 monooxygenase (CYP735A) and eventually is converted to zeatin.

TLS Online TPP Program

#Id: 4555

#Unit 8. Inheritance Biology

Gene Interaction Takes Place When Genes at Multiple Loci Determine a Single Phenotype.

TLS Online TPP Program

#Id: 4556

#Unit 8. Inheritance Biology

Genes exhibit independent assortment but do not act independently in their phenotypic expression.

TLS Online TPP Program

#Id: 4557

#Unit 8. Inheritance Biology

Collaborative gene interaction

TLS Online TPP Program

#Id: 4558

#Unit 8. Inheritance Biology

Comb shapes in chickens

9/16 walnut (R- P-)

3/16 rose (R- pp)

3/16 pea (rr P-)

1/16 single (rr pp)

TLS Online TPP Program

#Id: 4559

#Unit 8. Inheritance Biology

Gene Interaction with Epistasis

The effect of gene interaction is that one gene masks (hides) the effect of another gene at a different locus.

TLS Online TPP Program

#Id: 4560

#Unit 8. Inheritance Biology

RECESSIVE EPISTASIS

The recessive allele of one gene hides the expression of all alleles of another gene. Ex- coat color in Labrador retrievers