Complete Table 1 by putting a tick (✓) in the correct column to say which characteristics in humans are determined by the environment, inheritance or both.
Table 1
| Caused by the environment | Caused by inheritance | Caused by both |
Skin colour |
|
|
|
Eye colour |
|
|
|
Height |
|
|
|
Blood group |
|
|
|
Scars |
|
|
|
Having attached or detached earlobes |
|
|
|
Complete the sentences
Choose words in the box.
Phenotype Mutations Replications Genotype Evolution |
Within human populations everyone has different characteristics, this is called variation.
Differences in the DNA causes different characteristics. The DNA in genes changes due to events called _______________ . When this happens it can sometimes, but not always, lead to changes in the _______________ .
Some scientists investigated variation in pea plants growing in a garden.
They counted the number of peas in each pod, as shown in Figure 1.
They did this for all 49 plants in the garden.
Figure 1
Give one environmental factor and one other factor that might affect the number of peas in a pod.
Table 1 shows the data that the scientists collected.
Table 1
Mean number of peas in each pod | Number of plants |
5 | 17 |
6 | 14 |
7 | 8 |
8 | 10 |
Using the axes in Figure 2, complete the bar chart of the data in Table 1.
You will be awarded marks for:
Correctly plotted bars
Labelling both axes
Figure 2
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