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;
7 Cards in this Set
- Front
- Back
How can reproductive isolation occur? |
Behavioural changes (different courtship rituals) Seasonal changes (different mating or flowering seasons) Mechanical changes (changes to genitalia preventing successful mating) |
|
What does it mean if a population is polymorphic? |
It expresses more than one distinct phenotype |
|
What is artificial selection? |
The selection of breeding plants or animals that have desirable characteristics |
|
What is inbreeding? |
Breeding between closely related organisms |
|
What are the problems caused by inbreeding? |
The individuals are genetically similar so may have the same recessive alleles causing the offspring to be homozygous recessive for potential genetic disorders |
|
What are gene Banks? |
This can preserve genetic diversity by promoting outbreeding and reducing the frequency of homozygous recessive disorders They introduce more alleles into the gene pool and increase genetic diversity |
|
How can genetic diversity be measured? |
Genetic polymorphism |