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In a certain plant species, which is normally green, a recessive gene for colour (n) causes the plant to be white when present in the...

In a certain plant species, which is normally green, a recessive gene for colour (n) causes the plant to be white when present in the homozygous stat. Such plants die young at an early age. In the heterozygous state the plants are pale green and grow to maturity.
(a).Suggest a reason for the early death of the plants with the homozygous recessive genes.
(b).If a normal green plant was crossed with the pale green plant, what will be the phenotypic ratio of F1 generation?
(c).Give an explanation for the occurrence of pale green colour in the heterozygous state.

Answers

a) The gene for white colour are present in homozygous state; the plant will fail to manufacture chlorophyll hence no photosynthesis; they will thus die as soon as the food reserves are depleted;

c).Gene for white and green colour are both dominant; hence they all express themselves equally producing pale green plants/ Co-dominance;

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sharon kalunda answered the question on August 5, 2019 at 06:12

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