4.3.7 Types of Variation Flashcards
1
Q
What is interspecific variation
A
- Variation between species
- Useful in classifying different species
- Species that may look similar may have slightly different niches or roles in the habitat
- Genotypes will be different
2
Q
What is intraspecific variation
A
- Variation within species
3
Q
What is discontinuous variation?
A
- From qualitative differences
- Discrete and distinguishable categories
4
Q
What is continuous variation?
A
- Quantitative differences in phenotypes
- Wide range of values exist between 2 extremes in which the phenotypes will fall
5
Q
Causes of continuous variation
A
- Interactions between genetics and environment
6
Q
What is a polygene?
A
- When a large number of genes have a combined effect on the phenotype
7
Q
Environmental factors which can affect phenotype?
A
- Sunlight hours
- Food
- Water availability
- Temperature range
- Oxygen levels
- Affect how an organism develops and grows
