Variation

Question 1

what is variation

Answer 1

Variation arises from a combination of genetic and environmental causes. Most populations contain individuals that vary from one another. Some slight variations help organisms to adapt better to their environment

Question 2

Why is Variation important

Answer 2

1. It enables specifies to adapt better to changing environmental conditions, improving chances of survival
2. It makes it less likely that any adverse changes to the environment will wipe out an entire species since some organisms may be able to adapt to the new conditions

Question 3

What causes Variation to occur?

Answer 3

Environmental variation
egs of environmental factors in animals
- food, drugs, light, temperature

egs of environmental factors in plants
- Temp,light intensity, water

Genetic Variation
Mutation- the only source of brand new characteristics in the gene pool, so they are really the final source of all genetic variation
Random Fertilization- Any two gametes of opposite types can fuse together at fertilization so there are many different possible combinations of genes which may be produced

Question 4

What the two types of Variation

Answer 4

Discontinuous Variation
Continuous Variation

Question 5

Explain the two types of Variation

Answer 5

Continuous - characteristics show a continuous gradation from one extreme to the other without a break

Discontinuous - characteristics show clear cut differences with no intermediates. Individuals can be divided into distinct categories.