Haldane’s rule: hybrid sterility or hybrid inviability is often limited to the heterogametic sex. (The heterogametic sex is the one with two different sex chromosomes, while the homogametic sex has two sex chromosomes of the same type).

TLS Online TPP Program

#Id: 9715

#XL - T Zoology

Activated Ste11 then phosphorylates Ste7, a dual-specificity MEK.

TLS Online TPP Program

#Id: 9716

#XL - T Zoology

Ste7, phosphorylates and activates Fus3,  a serine/threonine kinase

TLS Online TPP Program

#Id: 9717

#XL - T Zoology

Fus3 equivalent to MAP kinase

TLS Online TPP Program

#Id: 9718

#XL - T Zoology

Fus3 translocates into the nucleus & phosphorylates two proteins, Dig1 and Dig2.

TLS Online TPP Program

#Id: 9719

#XL - T Zoology

Phosphorylated Dig1 and Dig2, relieves the inhibition of the Ste12 transcription factor.

TLS Online TPP Program

#Id: 9720

#XL - T Zoology

Activated Ste12, induces expression of proteins

involved in mating-specific cellular responses.