When the embryo has functional testes, Leydig cells of the fetal testis secrete testosterone, and the Sertoli cells secrete MIS (MRF)

TLS Online TPP Program

#Id: 95

#Unit 5. Developmental Biology

Cytoplasmic Determinants

Blastomeres of the early embryo are apportioned a set of critical determination factors within the egg cytoplasm that determine cell fate

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#Id: 6485

#Unit 3. Fundamental Processes

Model for the Interaction Between TBP and Promoters

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#Id: 6974

#Unit 8. Inheritance Biology

DOWN SYNDROME Also known as trisomy 21, is the most common autosomal aneuploidy in humans About 75% of the nondisjunction events that cause Down syndrome are maternal in origin, most arising in meiosis I. 

TLS Online TPP Program

#Id: 789

#Unit 3. Fundamental Processes

Rho factor is an essential protein in E. coli that causes transcription termination, accounts for almost half of E. coli terminators.

TLS Online TPP Program

#Id: 2917

#Unit 3. Fundamental Processes

Input of energy in the form of ATP is required at several stages for the prepriming reaction, and it is required for unwinding DNA.