BIO 322 Prep Exam – 2025/2026 2025 Fully Updated Study
Guide!
(Graded A+)
Prezygotic - barrier to transference of gametes to other species (premating/postmating)
Postzygotic - barrier after transference of gametes to other species (postmating)
Haploid - one set of chromosomes
Diploid - two sets of chromosomes
Polyploid - more than two sets of chromosomes; triploid, tetraploid, hexaploid
What causes a plant to be larger? - having more than two sets of chromosomes
Ecological Isolation - Two types:
Temporal
Habitat (geographical)
Temporal Isolation - breed at different times
Habitat (Geographical) Isolation - live in different habitats
Behavioral Isolation - specific mate recognition; can occur due to courtship rituals, pheromones,
visual and acoustic cues
Morphological - parts don't fit; different morphology between males and females of different species
, Is birth control considered pre or postzygotic? - Postzygotic
If the duck doesn't have the right corkscrew penis structure during mating with the female duck, she
will not allow the sperm to fertilize her eggs. This is an example of what type of isolation? - Genitalia
Isolation
If the duck doesn't have the right corkscrew penis structure during mating with the female duck, she
will not allow the sperm to fertilize her eggs. Is this considered pre or postzygotic? - Postzygotic
Hybridization - Includes the following:
Hybrids
Hybrid viabillity
Hybrid sterility
Muller incompatibility
Hybrid - interbreeding of two separate species; not typically healthy
Hybrid viability - low survival rates; heterozygote disadvantage
Hybrid sterility - hybrid survive, but can't reproduce
Muller incompatibility - genes are dependent on modifier genes for phenotype; Epistasis
Hybrid zones - - tend to be a narrow band where species overlap
- produce tension zones
- primary zone
- secondary zone
Tension zones - selection against hybrid; test of their survivability
Primary zone - divergence is currently taking place within a population
Guide!
(Graded A+)
Prezygotic - barrier to transference of gametes to other species (premating/postmating)
Postzygotic - barrier after transference of gametes to other species (postmating)
Haploid - one set of chromosomes
Diploid - two sets of chromosomes
Polyploid - more than two sets of chromosomes; triploid, tetraploid, hexaploid
What causes a plant to be larger? - having more than two sets of chromosomes
Ecological Isolation - Two types:
Temporal
Habitat (geographical)
Temporal Isolation - breed at different times
Habitat (Geographical) Isolation - live in different habitats
Behavioral Isolation - specific mate recognition; can occur due to courtship rituals, pheromones,
visual and acoustic cues
Morphological - parts don't fit; different morphology between males and females of different species
, Is birth control considered pre or postzygotic? - Postzygotic
If the duck doesn't have the right corkscrew penis structure during mating with the female duck, she
will not allow the sperm to fertilize her eggs. This is an example of what type of isolation? - Genitalia
Isolation
If the duck doesn't have the right corkscrew penis structure during mating with the female duck, she
will not allow the sperm to fertilize her eggs. Is this considered pre or postzygotic? - Postzygotic
Hybridization - Includes the following:
Hybrids
Hybrid viabillity
Hybrid sterility
Muller incompatibility
Hybrid - interbreeding of two separate species; not typically healthy
Hybrid viability - low survival rates; heterozygote disadvantage
Hybrid sterility - hybrid survive, but can't reproduce
Muller incompatibility - genes are dependent on modifier genes for phenotype; Epistasis
Hybrid zones - - tend to be a narrow band where species overlap
- produce tension zones
- primary zone
- secondary zone
Tension zones - selection against hybrid; test of their survivability
Primary zone - divergence is currently taking place within a population
