Bio 322 Exam 2 UPDATED ACTUAL Questions and CORRECT
Answers
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 Genitalia Isolation
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?
If the duck doesn't have the right corkscrew penis Postzygotic
structure during mating with the female duck, she will not
allow the sperm to fertilize her eggs. Is this considered
pre or 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
Secondary zone two recently separated populations re-establish contact
Changes within the secondary zone - reinforcement: doesn't survive
- fusion; survive in both a/biotic factors of their parents
- stability; survive inside the zone but will not survive outside the zone
Alleles are Different variations of the same gene at the same loci
Fireflies of different species are not able to recognize Behavioral isolation
each other as potential mates due to the pattern of
flashes. What type of reproductive isolating mechanism is
this an example of?
Which of the following reasons typically causes hybrid Incompatible number of chromosomes
sterility?
True or False: Congenital differences are due to True
environmental factors during development.
True or False: Mutations within somatic cells can be False
passed down to offspring.
Which of the following mechanisms is the only way to Mutations
introduce novel variation in a species?
Peripatric speciation occurs when A small population splits from the main population
Answers
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 Genitalia Isolation
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?
If the duck doesn't have the right corkscrew penis Postzygotic
structure during mating with the female duck, she will not
allow the sperm to fertilize her eggs. Is this considered
pre or 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
Secondary zone two recently separated populations re-establish contact
Changes within the secondary zone - reinforcement: doesn't survive
- fusion; survive in both a/biotic factors of their parents
- stability; survive inside the zone but will not survive outside the zone
Alleles are Different variations of the same gene at the same loci
Fireflies of different species are not able to recognize Behavioral isolation
each other as potential mates due to the pattern of
flashes. What type of reproductive isolating mechanism is
this an example of?
Which of the following reasons typically causes hybrid Incompatible number of chromosomes
sterility?
True or False: Congenital differences are due to True
environmental factors during development.
True or False: Mutations within somatic cells can be False
passed down to offspring.
Which of the following mechanisms is the only way to Mutations
introduce novel variation in a species?
Peripatric speciation occurs when A small population splits from the main population
