Hybridisation

Question 0

What type of polyploidy would be represented by a genetic code of AAAA?

Answer 0

Autotetraploid

The genome is duplicated

Question 1

What are the isolating mechanisms preventing hybridisation?

Answer 1

Geographical
Ecological
Temporal
Ethological
Mechanical
Breeding system
Interspecific incompatibility
Post zygotic --- hybrid invariability

Question 2

What type of polyploidy is represented by the genetic code A1A2A1A2?

Answer 2

Segmental allopolyploidy

2 partially differentiated genomes

Question 3

What type of polyploidy is represented by the genetic code AABB?

Answer 3

Allopolyploidy

2 well differentiated genomes

Question 4

What are the evolutionary consequences of hybridisiation?

Answer 4

If the hybrid is fertile:
Merging of gene pools
Hybrid zones
Introgression

Question 5

What is introgression?

Answer 5

When genes from one species are incoorporated into the gene pool of another. Hybrids back cross, this is repeated so the genotype is different however the phenotype is practically the same as the original species

Question 6

What methods can new species be developed by?

Answer 6

Genome repatterning in hybrid such that fertility is restored and there is reproductive isolation from both parents.
Allopolyploidy