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OCR A Biology

Chlorosis Body Mass Chlorophyll Environmental Genetic Factors Examples

Front Examples of characteristics that are influenced by both environment and genetics - chlorosis and animal body mass
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  • chlorosis is where plant forms less chlorophyll, so yellow/pale leaves and reduces ability to photosynthesise as result of environmental factors, so genetic factors code but environmental factors affect final appearence
  • due to e.g lack of light (plants turn off chlorophyll prod to conserve resources), mineral deficiencies (Fe needed as cofactor for enzymes forming chlorophyll, and Mg at heart of it), virus infections (inteferes with metabolism of cells)
  • body mass also affected by both genes and enviro, obesity results from enviro mainly, but sometimes genetic make-up (e.g mutations)

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