After counting all the fields, everyone first focused on the 10th and 11th fields.

According to the past thinking, the hybrid between high-stemmed peas and short-stemmed peas should produce two kinds of peas of random height and shortness, or medium-height peas in a compromise, and may even be different due to the difference between the male and female stamens, but no one thought that these two hybrid fields, without exception, were all high-stemmed peas.

This was contrary to the previous perception and surprised the students.

Because from the point of view of common sense, a couple with differences, the child born should be similar to one of the parties, or the intermediate type of interception of the characteristics of the two, but the performance of the pea is exactly the same as that of one of the couple, and not at all like the other party, it is unimaginable.

"I envisioned that the blood factor could control the height of the pea, but how to control it, there are three hypotheses."

Reiner explained, while starting to draw a diagram on a piece of paper.

"First, the blood factor that controls height and height takes effect randomly, and the offspring will randomly get the blood factor of the previous generation, if this argument is true, then the experimental phenomenon should be ......"

He didn't rush to finish, but looked at the three students, hoping that they would have their own independent thinking.

"If that's the case, the tall peas are crossed with the dwarf peas to produce random tall or short peas."

Xia Luo replied first, her thinking was very flexible, and she guessed the answer at once.

"Correct."

Reiner nodded at Charlotte, causing the girl to smile shyly.

"The second guess, the control of the height of the bloodline factor at the same time, the offspring will get two bloodline factors, fused with each other and manifested, if this guess is correct, then what will happen?"

"Peas will have tall stems, short stems, or medium heights."

Fina replied succinctly, she had excellent grades, and after Xia Luo's answer, she naturally understood Reiner's intentions.

"That's right."

Reiner smiled, although Fina didn't show anything, Dana saw that the other two had already been praised, and she was a little unwilling in her heart, and secretly clenched her fists.

"The third guess is that the offspring will get two bloodline factors from the previous generation, but one of the bloodline factors is stronger and completely suppresses the other bloodline, if this guess is true......"

Reiner looked at Dana, which made the girl even more apprehensive, and she racked her brains before finally replying with a flash of inspiration.

"Then the peas may exhibit exactly one characteristic, all tall or short stems."

Hearing Dana's answer, all the students looked at the two fields in unison, and the tall peas were thriving and producing plump pods.

"So, the veins of the tall stems are stronger than those of the short stems, so that all the peas become tall stems?"

Xia Luo muttered to herself, thoughtful.

"At present, it can be said that I call this stronger blood factor the dominant blood factor, and the corresponding weak blood factor is called the recessive blood factor."

Reiner added that the control method he uses is very common in biological experiments, and he took the opportunity to introduce it to his students.

"At the same time, I conducted two sets of experiments to exclude the influence of sex by swapping the pistils and stamens of two peas, and I can see that sex does not affect the traits of the offspring unless there are special circumstances."

"Wait, Mr. Reiner, there's another question in this hypothesis, that is, what does the blood factor of the tall stem do to the blood factor of the short stem, is it completely devoured, or is it assimilated, or is it just simply suppressed?"

Fina was the first to ask questions, and her thoughts were so deep that Reiner bowed slightly.

"You're thinking right, Fina, it seems that you've mastered how to think logically, to consider every possibility of a problem."

Reiner's compliment stunned the quiet-faced girl, and then pursed her lips slightly, but did not speak.

"We can now carry out a design experiment on this problem, because of the hybridization, we have the finished product of the hybridization of tall and short stem peas, and then, our second round of planting will allow these peas to self-pollinate normally, so that we can see what the actual status of the blood factor is in the high-stem peas that are crossed with the same blood factor."

With that, Reiner turned his gaze back to the three students.

"You can come up with some hypotheses, analyze the reasons at the same time, and then determine whether they are consistent based on the experimental phenomena."

"If it is completely engulfed and assimilated, then the second-generation peas at this time only have the blood factor of high stems, and the third-generation peas should all be high-stemmed peas."

Xia Luo said methodically, attracting a slightly envious look from Dana.

"If there is only simple suppression, then the second generation of peas has two blood factors, the third generation of peas produced by self-pollination...... Both tall and short stems may occur! ”

After a little thought, Xia Luo completed her conjecture.

"Wait a minute, doesn't this mean that even though it is a high-stemmed pea, it bears a short-stemmed pea, a trait that obviously did not exist in the previous generation, but it appears in the next generation?"

Dana was a little surprised, such a conclusion, if it was placed in the past, she would never believe it, but at this time, this is through step-by-step careful logical reasoning, which is convincing.

"It's hard to believe, but if there are really short-stemmed plants in the third generation of peas, then this conclusion should be correct."

Fina nodded, then looked at Reiner.

"Mr. Reiner, there should be more than one similar trait, and we can also use other traits to compare them for verification experiments."

"Well, yes, actually, about this, I have obtained several seeds with different characteristics through crossbreeding, and our first round of planting is mainly to investigate the transmission of traits, and the second round of planting is to explore how blood factors affect traits."

In conclusion, Reiner felt that the results of the first round of planting were enough to inspire the students to think independently.

After checking the condition of all the fields, they planted the sorted heterozygous seeds, and after about four days, they were able to observe the condition of the third generation of peas.

In fact, logically inferred, if the real dominant factor can completely assimilate the recessive factor, then the recessive factor should be extremely rare in nature, which is completely contrary to the colorful nature that people can observe.

But Reiner knows that in the end, it's all about practice.

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