1The environment can affect the degree to which a gene may be expressed in an individual. For example, soil type and weather conditions may affect plant growth. Seeds deliver energy for germination and initial growth until plants begin to photosynthesise and create their own glucose for further development.
To demonstrate the effect of environment on phenotype
2To formulate a hypothesis about the effect of environment on phenotype
To design and conduct a controlled experiment to demonstrate the effect of one environmental factor on a plant phenotype.
Radish plants that is grown in sunlight, room light and in the shade where there is absence of light, those that in the shade will display etiolating where there is pale stems and leaves, elongated stems and leaves reducing in size whilst those grown in light will be green, sturdier and shorter. The plants that are grown in the room light will be in the middle of the other two (light and dark).
Apparatus and materials-
6 plant pots
Beaker to measure amounts of water for the watering of plants
Pack of radish seeds
30 cm ruler that has mm written as well
Soil enough for 6 pots
The bean seedlings may have contagious diseases. Therefore gloves should be worn.
Leather shoes is most recommended to be worn as handling glass may break and water might make you slip
1. Put soil into each of the pots up to where the crease is, making sure it is even in all pots
2. Plant seeds by following instructions on the back of the packet
3. Germinate radish seeds with equal amounts
4. Two seedlings were left as a control; it was watered and taken care of normally under shade.
5. The other four seedlings were placed in either light covered area, or one in dark covered area
6. Water occasionally and wait for observable phenotypical results. Note Don’t overflow the pots with water just till moist.
7. Take notes of Plant growth