If this mutation appeared in the ancient world.

In that era, as long as a man could afford a wife, he had a chance to leave offspring.

Male mutation carriers can only give birth to sons. Among the sons, there are some who are mutation carriers and some who do not carry mutations. This group of sons, as long as they live to adulthood, can form a "combatant" family group.

Lan Ze's four sons, from Xiaomi to Zhang Yidian, what if these four boys were not naughty boys, but four great young men? The rice cooker at home would tremble and cry.

Compared with a family with two sons and two daughters, a family with four adult sons who also make a living by farming has more confidence when competing for water during the busy farming season.

A group of strong and strong men, in the primitive and agricultural era, could open up wasteland and farm, fight in groups, and even have some survival advantages. The mutation that only gives birth to sons is passed from son to grandson, and then from grandson to great-grandson, and the mutation gene continues

Spreading is simply inevitable.

As soon as this mutation starts to spread, I'm afraid it won't take many years until the number of girls among newborns drops to a certain proportion, and the human race will become extinct.

It is not an exaggeration to say that this mutation could bring about the end of the world for ancient society.

The mutation.asxs. in Lanze's body is the old man's. The old man's children all died due to various reasons when he was young.

If he himself died in the war, his mutation would not be passed on. In that case, his youngest son Lanze would not be able to think about the end of the world in front of the indescribable small plate.

The mutation passed down by the old man can no longer bring about a doomsday crisis in today's era.

Because, now there are nurseries to replace the human body and efficiently fill the gender gap in the population. Gender screening in nurseries can screen out tadpoles carrying X chromosomes with extremely low losses. Of course, any unnatural artificial means will always cause losses.

There will be a little bit.

Through the gender selection service at the nursery, the old man had six daughters.

The reason why there are six rather than more is because of prescribed constraints.

First, the number of gender-selected children of an individual is not allowed to exceed half of the total number of children; second, the total amount of gender selection nationwide is limited each year.

When there is a deviation in the sex ratio of newborns, gender selection will be greatly restricted. If it cannot correct the deviation, it is not allowed to aggravate the deviation.

In years when there are many girls, if you want a daughter through gender selection, you have to wait in line for a long time. Moreover, gender selection is only open for two months every year, and for genders with small quotas, quotas are always consumed very quickly.

Since statistics show that offspring of older parents have a higher rate of deformities, older birth-mothers prefer to choose daughters. There are some popular superstitions in every era. In this era, the most widely circulated superstition is

:The deformity rate of daughters is even lower.

In fact, there is no such thing. There is almost no difference in malformation rates between the two genders. Only for certain genetic diseases related to the X chromosome, the incidence rate in girls is indeed slightly lower.

Lanze was brought about by an unexpected pregnancy.

Among the sixteen children in front of the old man, there are six daughters, which is already very extraordinary.

If Lan Ze wants a daughter, he can also choose to queue up at the nursery. However, the one that Zhang He is carrying in his belly has not yet been seen with his own eyes before the lottery is drawn. Therefore, he still feels that,

Maybe it's a daughter.

He had been imagining her as a daughter for a while, although scientific logic now ruled out the existence of a daughter, but when he suddenly imagined a little boy again, his head was a little unable to turn around.

The effects of the mutation on his body go far beyond just good skin.

In addition to good skin, every impact is very important.

Developmental delays during the growth period, in addition to causing physiological effects, can also easily cause frustration in children carrying mutations.

Unless children are not evaluated in any way, or a multi-age mixed training method is adopted, children with poor abilities will automatically be brought into the role of "young".

Then, at the cellular level, death is slow. After leaving his body, his somatic cells and reproductive cells live longer and have strong vitality compared to ordinary people's cells.

By the way, because the germ cells of mutation carriers have strong vitality, the advantage of the germ cells carrying the Y chromosome in speed is amplified. Within a few days, the small cells carrying the X chromosome that can give birth to a daughter are incapable of giving birth to a daughter.

To catch up with the Y-chromosome cells that swim fast and give birth to a son; and the distance in the human body does not require several days of swimming to find the end point.

As a result, it is extremely difficult for men with this mutation to give birth to daughters in a natural state.

Women don't have this problem. After all, the chubby female reproductive cells don't need to race at all.

However, if it was an unconventional contact... Lanze thought for a while and thought that there was still a chance that he would have a daughter.

Because the dried liquid in the small dish can be reactivated after rehydration. So, if there is an interval of more than a week, there is still a chance of causing a space pregnancy through unconventional contact such as bath towels and paper towels. Moreover, at this time

In terms of segmentation, germ cells carrying X chromosomes have an advantage.

This kind of unconventional event is extremely difficult to happen. Lanze's mother was only pregnant once that year.

If you have to wait for more than a week to wait for the cells carrying the X chromosome to take advantage, it will be even more difficult to happen.

At least, it is absolutely impossible for Lan Ze to use the bath towel for a week. Under normal circumstances, he washes the bath towel twice a week.

During such a period of time, the son still has the opportunity to take advantage of the situation, but the daughter has no chance.

However, Lan Ze is not going to try. It sounds tempting to let Sister Zhang conceive a daughter, but in fact it is not realistic.

Zhang He has been working very hard. The last time he was pregnant with Xiaodian, it was the two of them messing around. Now this time, it was purely an accident.

Since there is a nursery available, they can wait in line to give birth to a daughter.

As for how long you have to wait in line, that depends on luck. If you are lucky, you may be able to get in line that year.

If the birth rate of girls is higher than that of boys for several consecutive years, it is difficult to say how long it will take.

Lan Ze didn't have time to sigh.

During the prime working time at noon every day, he could only allocate about ten minutes to "explore himself." It didn't take much effort to set up a film and take a look under the microscope.

Most of the time, you have to do serious work.
Chapter completed!