Can high school biology Mendelian be pollinated again after artificial pollination? 10

The second bagging test is a trait disturbance test to prevent pollen competition from other flowers and make the blooming flowers appear to be other flowers, because the pollen tubes do not have time to grow too long after artificial pollination and are easily disturbed.

Closed pollination is when the flowers open and have already passed the pollination period, that is, foreign pollen cannot grow on the stigma, so it can only be the autologous pollen that fell on the stigma before to grow pollen tubes and complete fertilization.

Pro: Artificial pollination is before flowering! Once the flowers bloom, they won't be pollinated anymore!

Bagging means that manual pollination may fail and that foreign pollen may be accepted if it is not bagged.

The flowers will definitely not be pollinated again.

I know what you mean.

Self-pollination is generally pollinated before the flowers bloom (pollen from other flowers will not be accepted), and the advantage of varieties selected from flower pollination is that there are many homozygous in nature.

Mendel did the hybridization when he did this experiment, and he removed the stamens (emasculation) before the pollen was ripe (and of course it was impossible to bloom at this time) so that it would not self-pollinate

That's another set of experiments, because peas are self-pollinating, so in order to avoid being affected by their own division, they have to be emasculated (must be before flowering, if the flowers bloom, it means that they have completed pollination, and then it is useless to sprinkle pollination).

The anthers (stamens) are mainly sperm cells, and the ovary (pistil) is mainly egg cells. For artificial insemination, two purebred pea flowers were selected, and the stamens of one and the pistil of the other were removed. Mendel did artificial hybridization, so it could not be fertilized by itself.

This ensures the correctness of the test results.

Manually cut the petals, emasculate or pollinate.

So it's a lot of work to do hybridization.

Self-pollination can only be self-bringed, what should I do if I want to do hybridization?

If you don't tell that crooked melon is a new variety, and it hasn't been found before, it's a genetic mutation.

If crooked melon is a relatively rare variety, then its genotype is the cause of cryptogenous explicit hail. According to the law of separation ... Alas, I can't write anymore.

Mendel in the pea hybridization experiment: paper bags are put over the flowers to prevent foreign pollen interference.

And paper bags can ensure breathability, while plastic bags cannot!

A emasculation time should be before flowering (flower bud stage), b emasculation should be clean and thorough, otherwise it will affect the experimental results, c can not use plastic bags to affect plant respiration, d maternal emasculation by the paternal ** pollen to the mother. The answer is C (I am also a freshman in high school, and I learned about the Mendelian pea hybridization experiment, and I had questions about whether I could use a plastic bag when I was bagging it, but I asked the teacher in class if the teacher didn't have a bird, so I thought about solving it myself. I thought so at the time, because if you use a plastic bag, the plant will do aerobic respiration and anaerobic respiration, and when the oxygen in the bag is used up, all anaerobic respiration will produce a lot of alcohol, but the toxic effect of alcohol on the plant will lead to the death of peas, and the test subjects will die and the experiment will fail.

If your personal thoughts are wrong, please point them out, thank you.

No, don't be misled by those few! Plastic bags are not breathable and cannot breathe!!

Yes, because to prevent pollen from pollinating each other, I just took a class the day before yesterday.

Peas in their natural state are self-pollinating, closed-pollinated plants that are strictly self-inbred. Mendel's experiment was a hybridization experiment, in which the stamens of the female parent were removed and the pollen of the male parent was given, which was a hybridization. These are two cases.

In the Mendelian hybridization experiment, in order to achieve the hybridization of the parents, the sedan reeds need to be artificially cross-pollinated, which needs to be emasculated at the flower-trapped sail budding stage, and artificially pollinated when the flowers are mature (due to the self-pollination of peas, the flowers are closed).

Peas are self-pollinating closed-flower pollinating plants, and the development and combination of pistils and stamens are completed before flowering, so artificial emasculation should be carried out before opening, and bagging is to prevent pollen from other varieties from pollinating experimental flowers (simply put, to prevent accidents).