Which of the following describes two species that exhibit a prezygotic mechanism of reproductive isolation? ... The rice species Oryza sativa and O. glaberrima can be crossed to produce F1 hybrid plants, but these hybrid plants produce empty pollen grains that cannot carry out fertilization.
What is Prezygotic mechanisms of reproductive isolation?
Reproductive isolation is a mechanism that keeps species from mating with others. ... Prezygotic mechanisms include habitat isolation, mating seasons , “mechanical” isolation, gamete isolation and behavioral isolation. Postzygotic mechanisms include hybrid inviability, hybrid sterility and hybrid “breakdown.”
Which of the following is an example of Prezygotic reproductive isolation?
Which of the following would be a good example of prezygotic reproductive isolation? Two bird species that live in the same area and engage in dramatically different courtship dances , even though they are similar in plumage, would be a good example of prezygotic reproductive isolation.
What type of isolation is Prezygotic isolation?
There are two main categories of reproductive isolation barriers: Prezygotic isolation – occurs before fertilisation can occur (no offspring are produced) Postzygotic isolation – occurs after fertilisation (offspring are either not viable or infertile)
What are the two mechanisms of reproductive isolation?
Zoologist Ernst Mayr classified the mechanisms of reproductive isolation in two broad categories: pre-zygotic for those that act before fertilization (or before mating in the case of animals) and post-zygotic for those that act after it.
What are 3 types of reproductive isolation?
Forms of prezygotic isolation include spatial, behavioral, mechanical and temporal isolation . Postzygotic isolation occurs after members of two different species have mated and produced a zygote.
What are the three mechanisms of reproductive isolation?
Three mechanisms for reproductive isolation are ecological, behavioral, and mechanical .
What are two types of Postzygotic barriers?
Postzygotic barriers can be separated into intrinsic and extrinsic reproductive isolating barriers . The former includes hybrid inviability and sterility, and the latter ecological and behavioral sterility (Coyne and Orr, 2004).
What are the 3 examples of Postzygotic barriers mentioned?
Postzygotic mechanisms include hybrid inviability, hybrid sterility and hybrid “breakdown .”
Which of the following are examples of Postzygotic reproductive barriers?
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 are the 3 types of Prezygotic barriers?
It looks like there are five major types of prezygotic barriers to reproduction: spatial isolation, temporal isolation, mechanical isolation, gametic isolation and behavioral isolation .
What’s an example of behavioral isolation?
Behavioral isolation occurs when populations of the same species begin to develop different behaviors that are not recognized or preferred by members in another population. The most common example of behavioral differences is mating calls . Two populations of the same species can have slightly different mating calls.
Which of the following is not included as Prezygotic reproductive isolation mechanism?
Answer and Explanation: Correct Answer: C) Hybrid sterility is correct answer because it is a not type of pre zygotic isolating mechanism, but it is a type of post-zygotic...
What is meant by reproductive isolation?
: the inability of a species to breed successfully with related species due to geographical, behavioral, physiological, or genetic barriers or differences.
What are the four steps of reproductive isolation?
These include temporal isolation, ecological isolation, behavioral isolation, and mechanical isolation . Post-zygotic barriers: barriers that come into play after two species have mated.
What are isolating mechanisms in evolution?
Isolating mechanisms are intrinsic characteristics of species that reduce or prevent successful reproduction with members of other species . Viewed genetically, they are characters that act as barriers to the exchange of genes between populations.
