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.

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#Question id: 23654

#Unit 13. Methods in Biology

How many recombinant clones must be present in a cDNA library to be 95% certain that the library contains one clone of a particular mRNA molecule representing 0.005% of the total mRNA? 

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#Question id: 32145

#Unit 1. Molecules and their Interaction Relevant to Biology

Flattened out on helix surface of Major-groove proportions are found in

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#Question id: 4636

#Unit 11. Evolution and Behavior

Given a population that contains genetic variation, what is the correct sequence of the following events, under the influence of natural selection?

1. Well-adapted individuals leave more offspring than do poorly adapted individuals.

2. A change occurs in the environment.

3. Genetic frequencies within the population change.

4. Poorly adapted individuals have decreased survivorship.

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#Question id: 23222

#Unit 2. Cellular Organization

Which ratio of bacteria is high compared to the same ratio for larger organisms of similar shape?

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#Question id: 17283

#Unit 9. Diversity of Life Forms

The structural integrity of bacteria is to peptidoglycan as the structural integrity of plant spores is to__