Differences in characteristics (phenotype) within a species and between a species
1 of 14
What two factors affect the phenotype?
genotype and environment
2 of 14
What three genetic factors could affect variation?
- mutation - meiosis - random fertilisation of gametes
3 of 14
What types of organisms are able to increase variation by these three factors?
Sexually reproducing organisms
4 of 14
What type of variation arises when it is due to genetic factors?
Discontinuous variation
5 of 14
How can discontinuous data be represented?
Bar chart/ pie chart
6 of 14
When variation is due to genetic factors, are these traits usually controlled by one or more genes?
one gene
7 of 14
When variation is due to genetic factors, individuals tend to fit in to _____ _____ with no intermediate types
distinct groups
8 of 14
Give an example of a genetic characteristic which has distinct groups
Blood groups (A, B, AB, O)
9 of 14
Give four environmental factors which could affect variation
- temperature - rainfall - sunlight - food availibility
10 of 14
How do environmental factors affect variation taking into consideration genetic factors?
Some characteristics (such as height) may be genetically determined (such as maximum height) but their genotype may not be fulfilled due to environmental factors, hence affecting their phenotype
11 of 14
What type of variation does environmental factors affect?
Continuous variation
12 of 14
What type of graph would be formed if height variation was plotted?
A normal distrubution curve
13 of 14
When environmental factors affect the phenotype- are these characteristics usually controlled by one or more genes?
More than one gene
14 of 14
Other cards in this set
Card 2
Front
What two factors affect the phenotype?
Back
genotype and environment
Card 3
Front
What three genetic factors could affect variation?
Back
Card 4
Front
What types of organisms are able to increase variation by these three factors?
Back
Card 5
Front
What type of variation arises when it is due to genetic factors?
Comments
No comments have yet been made