Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
phenotypes are a result of |
mixing genes from two parents via sexual reproduction |
|
Gene pool |
sum of all genes in a population |
|
populations with larger gene pools are said to have a larger?? |
genetic fitness |
|
Inheritable variation excludes the effectsof ‘local factors’ which are |
light, food and water availability |
|
allele |
one of a pair of genes that appear at a particular location on a particular chromosome and control the same characteristic |
|
A stable environment will favour populations with littleinherent ____________ |
variability |
|
Gene Flow |
the transfer of alleles or genes from one population to another. Migration into or out of a population may be responsible for a marked change in allele frequencies |
|
Mutations |
Random changes in genetic material |
|
Non-random Natural Selection |
environment selects for those inheritedmutations which are advantageous and selects against those which aredeleterious |
|
bottleneck |
extreme reduction of alleles and genetic fitness |
|
convergence |
features of dissimilar origin which look alike |
|
analogy |
characters which look the same but have different origins |
|
dimorphism |
‘two dissimilar types’ (sexual dimorphism: males & females) |
|
homology |
different characters having the same structural origin |
|
immutable |
unchanged throughout the passage of time |
|
mineralisation |
replacement of tissue with inert mineral to form a fossil |
|
primitive (trait) |
trait or character which occurred in an ancestor. |
|
systematics |
study of diversity and relationships between organisms (also taxonomy) |