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32.3 - Do First - Pre vs. Post Zygotic Barriers

Last updated over 1 year ago

11 questions

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Question 2

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Question 6

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Question 10

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Question 11

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Question 11

11.

How is "hybrid breakdown" different from reduced hybrid viability and reduced hybrid fertility?

Speciation is...

the formation of 1 or more species form a current species

the development of special skills within an environment.

Reproductive isolation prevents gene flow and the exchanging of DNA for a period of time. What are the two types of reproductive isolation?

prezygotic barriers

postzygotic barriers

kostic separation

hibernation techniques

Temporal isolation causes speciation because two different species...

share a meal together

soak in body temperature

breed at different times.

fight to the death for territorial reasons

Behavioral isolation includes..

displaying different courtship songs or colors or dances that fail to attract a different species

farting on command

genes are genetically not matching for whatever reason

Which type of isolation occurs when animals have different chromosome numbers in their gametes (sperm  and eggs) that fail to produce offspring?

gametic isolation

mechanical isolation

habitat isolation

Postzygotic barriers...

occur after fertilization/mating

occur before fertilization/mating

The trouble with postzygotic barriers is that..

no viable or fertile offspring is produced.

we do not see it in nature but only in a lab.

it is a phenomenon and cannot be completely understood by science.

What type of postzygotic barriers results in weak or frail offspring?

Reduced Hybrid Viability

Reduced Hybrid Fertility

What type of postzygotic barriers results in healthy offspring that are actually sterile or infertile?

Reduced Hybrid Fertility

Reduced Hybrid Viability

A mule is a cross between a male donkey and a female horse. Mules are hybrids that cannot produce children of their own. They have...

reduced hybrid viability

reduced hybrid fertility