What name is given to a sudden change in a gene or chromosome?
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2012
Two yellow-flowered hybrid plants each carrying a recessive factor for flowers with green colour were crossed.Which of the following ratios shows the correct proportion of offspring that have green flowers?
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2012
In a case of complete dominance, what is the phenotypic ratio of the cross Bb X Bb; where B =black and b = white?
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2012
In the structure of DNA, which of the following statements is true?
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2012
Two plants with red flowers were back crossed, which of the following results indicate that the plants are heterozygousRed flowers, where red flowers are dominant?
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2012
Which of the following sequences is the correct evolutionary trend in plants?
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2012
Bees are of great importance to the farmer because they
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2012
In the diagram, the arrow labelled II represents the