Breeding experiment was performed on pure lines of tomatoes differing in fruit weight. The plants were all grown in a controlled environment chamber providing equal environmental conditions for all individuals as far as humanly possible. The results were as follows:

a) One dominants polygene contribution?

b) What will be frequency of 20 g in F2 CLASSES?

c) Number of polygene loci for this character.

TLS Online TPP Program

#Question id: 11223

#Unit 7. System Physiology – Animal

Of those listed, which event occurs first following a depolarizing stimulus applied to the presynaptic membrane of an axon terminal?

TLS Online TPP Program

#Question id: 11222

#Unit 7. System Physiology – Animal

A chemical that affects neuronal function but is not stored in presynaptic vesicles is ________.

TLS Online TPP Program

#Question id: 11221

#Unit 7. System Physiology – Animal

The heart rate of a vertebrate will decrease in response to the arrival of ________.

TLS Online TPP Program

#Question id: 11220

#Unit 7. System Physiology – Animal

The botulinum toxin, which causes botulism, reduces the synaptic release of ________.

TLS Online TPP Program

#Question id: 11219

#Unit 7. System Physiology – Animal

The amino acid that operates at most inhibitory synapses in the brain is ________.

TLS Online TPP Program

#Question id: 11218

#Unit 7. System Physiology – Animal

Neurotransmitters can affect postsynaptic cells by ________.

I) initiating signal transduction pathways in the cells

II) causing molecular changes in the cells

III) altering ion channel proteinsIII) altering ion channel proteins

IV) altering the permeability of the cells