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Provide examples of the following prezygotic barriers to reproduction: Temporal isolation, Habitat isolation, Behavioral isolation, Mechanical isolation, and Gametic isolation

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Tod Thiel
Tod ThielLv2
28 Sep 2019
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Related questions

1. Biomes - Match the biome with itsdescription.
Potential Matches:
1 : Coniferous forest
2 : Temperate forest
3 : Tundra
4 : Tropical rainforest
5 : Grassland
6 : Wetland
7 : Estuary
8 : Desert
Answer
: Caribou, musk ox and lemmingsare common, along with permafrost, mosses and lichens.
: May be hot or cold, but alwaysvery dry.
: Long snowy winters and shortsummers allow for cone-bearing evergreen trees to flourish.
: Spectacular displays of colorin the fall occur before deciduous trees drop their leaves.
: Plentiful rainfall and warmyear round temperatures produce a habitat home to the greatestdiversity of plants and animals.
: Mostly treeless expanse knownfor large herds of grazing mammals.
: Home to migrating waterfowl,this type of biome is important in reducing flooding and improvingwater quality.
: Transition area between a riverand an ocean with salinity ranging from nearly that of freshwaterto that of the oceans.
2 Genetics - Match the terms with the mostsuitable description.
(Points : 16)
Potential Matches:
1 : recessive
2 : sex-linked
3 : pleiotropy
4 : carrier
5 : dominant
6 : phenotype
7 : polygenic
8 : genotype
Answer
: An allele that can be expressedby an individual that is heterozygous.
: The genetic make-up of anindividual.
: The control of more than onephenotypic character by a single gene.
: The visible physical expressionof an individual's genetic make-up.
: An allele that can only beexpressed when an individual is homozygous.
: A trait controlled by more thanjust a single pair of alleles.
: A trait controlled by a genelocated on either the X or Y chromosomes.
: An individual carrying only oneallele of a recessively inherited disorder.
3. Evolution - Match the terms with the mostsuitable description.
(Points : 16)
Potential Matches:
1 : hybrid sterility
2 : habitat isolation
3 : hybrid inviability
4 : geographic isolation
5 : mechanical isolation
6 : gamete mortality
7 : temporal isolation
8 : behavioral isolation
Answer
: Because of a single mutation ina developmental gene, two closely related species of wasps have aslightly different anatomy of their sex organs making interbreedingimpossible.
: Two species of snakes aremorphologically very similar but breed during differentseasons.
: Two similar species oftreehoppers live and feed on two separate species of trees.
: Males of two species of birdsuse different mating dances to attract their mates.
: Due to a geographic barrier, asmall portion of a population remains isolated and its gene pooldiverges from that of the original population.
: Sperm from a male of onespecies dies in the reproductive tract of the female of a differentspecies before fertilization can occur
: Mules are a cross between adonkey and a horse; they are viable, healthy animals, but theycannot reproduce.
: A cross between two species ofsalamanders yields offspring, but they do not survive long enoughto reproduce

QUESTION 1

A dam dividing a fish population will likely lead to sympatricspeciation.

True

False

10 points

QUESTION 2

As certain lineages of animals evolved more and more complexbody plans, what has happened to the Hox genes of theseanimals?

The number of Hox genes has been reduced

The more complex the body plan, the greater the number of Hoxgenes.

Complex body plans have more inactive Hox genes

There is no correlation between body plan complexity and Hoxgenes

10 points

QUESTION 3

Which of the following would lead to allopatric speciation?

the colonization of an island by a subset of the mainlandpopulation

a new river channel dividing beetles into two separatepopulations

the extinction of a large proportion of a population, leavingonly distant sub-populations

all of the above

10 points

QUESTION 4

The hybrid sterility of a hinny (cross between a female horseand a male donkey) is an example of

prezygotic isolation

allopatric speciation

sympatric speciation

postzygotic isolation

just 4_5 sentences only 2 topics

1. Explain the difference between indirect and direct benefits of mate choosiness.

2. List at least 3 prezygotic and/or 3 postzygotic mechanisms of reproductive isolation and be able to describe at least one of the mechanisms that you have listed.

3. Are humans still evolving? Provide an answer to that question where you develop a hypothesis and prediction along with current evidence that supports your hypothesis.

4. Discuss how “genetic” does not mean “unchangeable” and relate this idea to flexible behaviors

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