What is a species?
A species is a group of organisms capable of to produce that are viable and fertile.
Categorize the following based on fertility
most fertile
fertile
infertile
A dove lays 5 eggs
A dove lays 2 eggs
A dove lays no eggs
When two different species mate they can produce a hybrid individual with chromosomes and genetic traits from both species. This can result in Reduced Hybrid Fertility which means:
Categorize the following based on viability.
Infertile
Inviable
Viable
Fertile
Two different frog species mate but all of the tadpoles do not develop and die upon birth. The ofsspring are _____________.
1 option
Two different frog species mate and all of the tadpoles live, but none of the tadpoles can reproduce. The offspring are _________ and _________.
2 options
Two frogs from the same species mate and produce 100 tadpoles and those tadpoles grow up and mate to produce 100 more tadpoles. The offspring are ___________ and ____________.
2 options
When two different species mate they can produce a hybrid individual with chromosomes and genetic traits from both species. This can result in "Reduced Hybrid Viability" which means:
What is speciation?
Speciation is the of forming a species. This happens when populations become reproductively from each other.
"Pre" means .
"Post" means
Word Bank: mating after before
Prezygotic barriers: These are barriers that occur
Postzygotic barriers: These are barriers that occur
Based upon what your just read, what are the three possible situations that can occur if two different species mate and the chromosomes do not match?
What does it mean to become geographically isolated?
A population of hares originally lived in a cold climate. Some of them were accidentially onboard a ship, when it left for a tropical island. The two populations became geographically isolated. Doodle what you think the island rabbits would look like after millions of years of evolution.
According to the reading, what is the difference between sympatric speciation in plants compared to animals?
Make a short bullet point list.
*
*
*
Sym means "same" and allo means "different". The word patric means "fatherland/countryland". Use these understandings to categorize the following.
Sympatric speciation
Allopatric speciation
A new species arise as a result of geographic isolation.
Two subpopulations become reproductively isolated within the same geographic area leading to new species.
Speciation is one factor that can cause extinction. State each of the other factors that can cause extinction, using the doodles:
A mass extinction event is when over % of species out in a relatively short period of time. More than 99% of species that have EVER lived are now . Many of these extinctions occurred in a mass extinction event.
The last mass extinction was around 65 years ago. It wiped out most species and many animal and plant species. We know this, because these species suddenly disappear from the fossil record at that time. Theories for the cause of this mass extinction include a impact or huge eruptions.
A zoo wants to assist two related endangered species with their reproduction and plans to directly implant the sperm into the female.
Which type of isolation can NOT be overcome in this way?
Two species of plants that do not cross-pollinate are an example of _____ isolation because they flower at different times of the year.
Form of reproductive isolation in which two populations develop differences in courtship rituals or other mating behaviors that prevent them from breeding. Ex. different songs or different colors
The pollen (sperm) of a flowering plant cannot fertilize the egg cell of a nearby flowering plant of its kind.
What type of reproductive barrier is this?
A certain population of flowers only reproduces in the winter. A neighboring species only reproduces in the fall. This is an example of:
Some female peacocks prefer males with large, colorful tales while other female peacocks prefer males with no tail at all. Females are beginning to only mate with the type of males with the tail they prefer. What type of reproductive barrier is this?
The genitalia of the male damselfly varies in shape. Certain males can only hold onto & mate with females whose genitalia fit. What type of reproductive barrier is this?
When a zebra & horse mate, they create a "zorse". Zorses are most often sterile.
What type of reproductive barrier is this?