Multiple Choice
Which type of speciation occurs when a geographic barrier splits the population into two or more groups?
22. Evolutionary Genetics
Speciation
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Which of the following is an example of a postzygotic reproductive isolation mechanism?
A
Two organisms do not produce offspring because one is sleeping while the other is awake
B
Two organisms do not produce offspring because one does not contain the appropriate body parts to mate with the other organisms
C
Two organisms do not produce offspring because the fetus is always lost through miscarriage
D
Two organisms do not produce offspring because one lives in water and the other lives on land
Verified step by step guidance1
Understand the concept of reproductive isolation, which is a mechanism that prevents species from mating with each other or ensures that any offspring are sterile.
Differentiate between prezygotic and postzygotic isolation mechanisms. Prezygotic mechanisms prevent fertilization, while postzygotic mechanisms occur after fertilization.
Identify examples of prezygotic isolation: temporal isolation (different mating times), mechanical isolation (incompatible reproductive organs), and habitat isolation (different living environments).
Recognize that postzygotic isolation involves issues after fertilization, such as hybrid inviability (offspring do not develop properly) or hybrid sterility (offspring are sterile).
Analyze the given options: the correct example of postzygotic isolation is when the fetus is always lost through miscarriage, indicating hybrid inviability.
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