What prevents mules from having offspring?

What prevents mules from having offspring? They can’t produce eggs and sperm. How does polyploidy cause reproductive isolation? It alters the number of chromosomes in sex cells.

What prevents mules from producing offspring quizlet?

What prevents mules from producing offspring? Chromosomes cannot pair correctly during meiosis.

How does polyploidy cause reproductive isolation?

Polyploidy aids in reproductive isolation because an organism with more than two sets of chromosomes cannot always produce offspring.

When a donkey mates with a horse a mule is produced However mules are sterile This is an example of?

Ap Biology : Example Question #1 Explanation: Classifying species can be a difficult and particularly gray area. The key to this question, however, is that mules are sterile. This is an example of post-zygotic reproductive isolation.

What is a Postzygotic barrier?

postzygotic barrier: a mechanism that blocks reproduction after fertilization and zygote formation. hybrid inviability: a situation in which a mating between two individuals creates a hybrid that does not survive past the embryonic stages.

What is a Prezygotic barrier?

Prezygotic barriers: Anything that prevents mating and fertilization is a prezygotic mechanism. Habitat isolation, behavioral isolation, temporal isolation, mechanical isolation and gametic isolation are all examples of prezygotic isolating mechanisms.

What situation results from a Postfertilization barrier to reproduction quizlet?

What situation results from a postfertilization barrier to reproduction? The eggs released by sponges during reproduction have proteins on their surfaces that prevent sperm from different sponge species from binding to the eggs. What type of reproductive isolation would include this example?

Why would apple maggot flies be considered two separate races?

Why would apple maggot flies be considered two separate races? Two fly species have differently shaped genitals that prevent interspecies mating.

What type of conditions may lead to adaptive radiation?

Conditions. Adaptive radiations are thought to be triggered by an ecological opportunity or a new adaptive zone. Sources of ecological opportunity can be the loss of antagonists (competitors or predators), the evolution of a key innovation or dispersal to a new environment.

What are the 3 main postzygotic reproductive barriers?

Post-zygotic Barriers to Reproduction

• Hybrid Zygote Abnormality. While gametes from different species can sometimes fuse to produce a hybrid zygote, these zygotes are frequently abnormal.
• Hybrid Infertility.
• Low Hybrid Viability.

What is Prezygotic?

Prezygotic isolation is the type of reproductive isolation, occurring prior to mating and fertilization. Therefore, it prevents the formation of a zygote. Significantly, it provides chances for natural selection. However, prezygotic isolation can occur through habitat, behavioral, mechanical, gametic isolation.