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#Question id: 4764

Which of the following is the best example of overdominance?

#SCPH12 I Genetics

  1. Two lines of true breeding white parents produce purple flowered offspring.

  2. Two lines of true breeding tomatoes that are susceptible to verticillium wilt (a fungal infection) produce offspring thatare resistant to verticillium wilt.

  3. Two true breeding lines, one tall and one short, produce offspring of medium height.

  4. Two true breeding lines, one tall and one short, produce all tall offspring.

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#Question id: 2077

#SCPH05 I Biotechnology

In receptor-mediated endocytosis, receptor molecules initially project to the outside of the cell. Where do they end up after endocytosis?
TLS Online TPP Program

#Question id: 8927

#I Life Science/ Life Sciences Group – I-V

Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that
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#Question id: 282

#SCPH12 I Genetics

A HATS enzymes reacts with the side-chain of lysine to form the following structure: What effect will the HATS enzymes have on histones?
TLS Online TPP Program

#Question id: 7309

#I Life Science/ Life Sciences Group – I-V

Following statements are regarding to the molecular basis of the coincidence model in Arabidopsis.

A. In Arabidopsis under short days, there is little overlap between CO mRNA expression and daylight.

B. CO protein does not accumulate to sufficient levels in the phloem to promote the expression of the transmissible floral stimulus and the plant remains vegetative.

C. Under long days, the peak of CO mRNA abundance (at hours 12 through 16) overlaps with daylight (sensed by phyA and cryptochrome [cry]), allowing CO protein to accumulate.

D. CO activates FLC mRNA expression in the phloem, which causes flowering when the FT protein is translocated to the apical meristem.

Which of the following is incorrect?
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#Question id: 11145

#I Life Science/ Life Sciences Group – I-V

Two fundamental concepts about the ion channels of a "resting" neuron are that the channels ________.