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TLS Online TPP Program

#Id: 9306

There are about 90 million rod cells in the human retina, and each contains about 4x107 molecules of rhodopsin that are very densely packed in the membrane disks.

#Unit 4. Cell Communication and Cell Signaling #Visual Signaling #Part B Pointers
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TLS Online TPP Program

#Id: 6259

#Unit 8. Inheritance Biology

Genes exhibit independent assortment but do not act independently in their phenotypic expression. 
TLS Online TPP Program

#Id: 6260

#Unit 8. Inheritance Biology

Collaborative gene interaction
TLS Online TPP Program

#Id: 6261

#Unit 8. Inheritance Biology

Collaborative gene interaction

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: 6262

#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: 6263

#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
TLS Online TPP Program

#Id: 6264

#Unit 8. Inheritance Biology