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TLS Online TPP Program

#Id: 6910

Reverse duplication - Duplicated segment is inverted.
 

#Unit 8. Inheritance Biology #Structural and numerical alterations of chromosomes #Part B Pointers
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TLS Online TPP Program

#Id: 942

#Unit 5. Developmental Biology

Two major mechanisms during fertilization in sea urchin:
Species-specific sperm attraction 
Species-specific sperm activation
TLS Online TPP Program

#Id: 943

#Unit 5. Developmental Biology

Chemotaxis 
sperms are attracted toward eggs of their species by following a gradient of a chemical secreted by the egg.
TLS Online TPP Program

#Id: 944

#Unit 5. Developmental Biology

In Sea urchin,
Sperm-activating peptides provide direction to sperm during chemotaxis.
TLS Online TPP Program

#Id: 945

#Unit 5. Developmental Biology

SAP in the egg jelly of the sea urchin Arbacia punctulata 
Resact (14-amino acid chemotactic peptide)
TLS Online TPP Program

#Id: 946

#Unit 5. Developmental Biology

SAP in the egg jelly of, Strongylocentrotus purpuratus
Speract
TLS Online TPP Program

#Id: 947

#Unit 5. Developmental Biology

Resact from Arbacia egg jelly binds to its receptor on the sperm, activates the receptor’s guanylyl cyclase (RGC) activity.