4.7 - Investigating diversity Flashcards
1
Q
State 4 comparisons for genetic diversity within/between species
A
- frequency of measurable/observable characteristics
- DNA base sequence
- mRNA base sequence
- amino acid sequence of proteins encoded by DNA and mRNA
2
Q
How is variation between a species investigated?
A
- collecting data from random samples
- calculating mean value from data and calculating SD of mean
- interpreting these
3
Q
Limitations of comparing observable characteristics as a measure of genetic diversity within/between species
A
- characteristics may be coded for by more than 1 gene
- same characteristics could have arisen separately
- characteristics could have been influenced by environment not genes
4
Q
What do scientists use instead of comparing observable characteristics?
A
gene technology
5
Q
Name for differences between individuals of same species
A
intraspecific variation
6
Q
Name for differences between different species
A
interspecific variation
7
Q
Suggest sources of DNA from dead organisms
A
- bones
- skin
- preserved remains
- museums
8
Q
Suggest reasons why populations may show very low levels of genetic diversity
A
- genetic bottleneck
- Founder effect
- inbreeding
