which of the following is an example of post- zygotic isolation? course hero

Which of the following is a postzygotic isolation mechanism?

Postzygotic mechanisms include hybrid inviability, hybrid sterility and hybrid "breakdown."

What is an example of postzygotic reproductive isolation?

What are two examples of a Postzygotic barrier? One example of a postzygotic barrier is low hybrid viability. This is where hybrid offspring are born but have lower fitness and are therefore less likely to reach sexual maturity. Another example is hybrid sterility, where hybrid offspring is healthy but unable to breed.Jan 5, 2022

Which of the following is an example of postzygotic barrier?

Explanation: Hybrid sterility is an example of post-zygotic reproductive isolation. In the case of hybrid sterility, hybridization can occur between two species, however the resulting hybrids are unable to produce; the hybrids are sterile.

What is postzygotic isolation?

Postzygotic isolation occurs after members of two different species have mated and produced a zygote. The offspring of such a mating is called a hybrid. Hybrids are frequently unable to reproduce themselves, so the production of a hybrid is not considered a successful mating.

Is post zygotic common in animals?

Yet, the fact that intrinsic postzygotic barriers are common across all kingdoms of life, and are a hallmark of most 'good' species [16] suggests that their role in speciation may also be essential.Jul 13, 2020

Which is an example of a postzygotic isolating mechanism quizlet?

A mating between two species in which the zygote dies early in its development (i.e. dies during embryogenesis) is a form of pre-zygotic isolating mechanisms. This is an example of a postzygotic isolating mechanism. In other words, the isolating mechanism (i.e. death of the zygote) happens after the zygote forms.

Which example is a post fertilization barrier?

Explanation: Zygote mortality is an example of post-zygotic reproductive isolation. In this type of reproductive isolation, gametes from two species may fuse, however the zygote is inviable shortly after fertilization due to improper development.

What are the 3 postzygotic barriers?

Post-zygotic Barriers to ReproductionHybrid 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.

Which of the following is an example of postzygotic barrier quizlet?

Which of the following is an example of a postzygotic reproductive barrier? One species of flower grows in forested areas, another in meadows. The sperm of a marine worm penetrate eggs of the same species only. Two fruit flies of different species produce sterile offspring.

What is pre zygotic and post zygotic?

Definition. Prezygotic isolation refers to the type of reproductive isolation that occurs before the formation of the zygote. Postzygotic isolation refers to the second type of reproductive isolation which occurs after the production of the zygote.Nov 20, 2019

What is the difference of pre zygotic and post zygotic?

The key difference between prezygotic and postzygotic is that the prezygotic is a mechanism of reproductive isolation, which prevents the fertilization of the egg while the postzygotic is a mechanism of reproductive isolation, which prevents the formation of viable or fertile offspring.Aug 26, 2018

Is geographical isolation pre or post zygotic?

In contrast, the lack of assortative mating and hybrid sterility observed in allopatric populations suggests that geographic isolation enables the evolution of intrinsic postzygotic reproductive isolation. Our results show how the types of reproductive barriers that evolve between species may depend on geography.