Hello everyone, today I will answer the following questions for you. Regarding reproductive isolation, what is the principle of reproductive isolation? Many people don’t know this yet. Let’s take a look at it now. Look!
Contents of this article
- Is reproductive isolation the result of evolution or a necessary condition
- Classification of reproductive isolation
- Is there reproductive isolation between subspecies
- What is the principle of reproductive isolation
- Do plants have reproductive isolation?
- Why do diploids and tetraploids have reproductive isolation
1. Is reproductive isolation the result of evolution or a necessary condition
Isolation is a necessary condition for the formation of new species. This is ! Biological evolution does not require isolation
2. Classification of reproductive isolation
1. Reproductive isolation refers to an isolation mechanism in which, due to various reasons, groups with close genetic relationships do not mate under natural conditions, or even if they can mate, they cannot produce offspring or cannot produce fertile offspring. However, cross-species Reproductive isolation appears and disappears in many cases.
2. If isolation occurs before fertilization, it is called reproductive isolation before fertilization, which includes geographical isolation, ecological isolation, seasonal isolation, physiological isolation, and morphological isolation. Isolation and behavioral isolation, etc.; if isolation occurs after fertilization, it is called post-fertilization reproductive isolation, which includes hybrid inviability, hybrid sterility, hybrid decline, etc.
3. Is there reproductive isolation between subspecies
1. There is no reproductive isolation between subspecies. Reproductive isolation refers to an isolation mechanism in which, due to various reasons, groups with close genetic relationships do not mate under natural conditions, and even if they can mate, they cannot produce offspring or cannot produce fertile offspring. This is called reproductive isolation.
2. Including geographical isolation, ecological isolation, seasonsIsolation, physiological isolation, morphological isolation, behavioral isolation, etc. If isolation occurs after fertilization, it is called post-fertilization reproductive isolation, hybrid sterility, hybrid decline, etc. There are 27 subspecies of wild boar around the world.
4. What is the principle of reproductive isolation
1. Reproduction The principle of isolation refers to the physical and physiological separation of biological individuals, resulting in the phenomenon that different populations cannot interbreed.
2. Specifically, this kind of isolation can be caused by time (such as different breeding seasons), space (such as isolation of origin), and behavior (such as different courtship behaviors) It is caused by various factors such as physical and physiological (such as the inability of the gonads to combine or the inability of the sperm to fertilize the egg).
3. Reproductive isolation is an important strategy to maintain species diversity and protect natural ecological balance.
5. Do plants have reproductive isolation
Various types Reproductive isolation essentially hinders genetic exchange between different species, making each isolated population more stable and ensuring that each develops in a direction compatible with the environment under natural conditions. Therefore, species are reproductively isolated populations, and the development from geographical isolation to reproductive isolation is the basic factor in the formation of most species.
6. Why do diploids and tetraploids have reproductive isolation
1. First, we must clarify the concept of reproductive isolation. Reproductive isolation means that two organisms cannot mate or can mate. The offspring produced after mating will be infertile. Reproductive isolation has these two situations.
2. Both diploid and tetraploid can undergo normal meiosis and produce normal germ cells. Therefore, diploid and tetraploid They can mate and their offspring will be triploid.
3. Three chromosome sets in triploid somatic cells cannot be completed normally during meiosis, so triploids are infertile. Therefore, although diploids and tetraploids can mate, the sterility of the offspring is a case of reproductive isolation.
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