Questions about heredity Genetics Questions?

Physiognomy is only one aspect of genetic material determination.

And this aspect is for the whole genetic material.

May be limited.

In addition, any trait in heredity is controlled by alleles.

It is a trait that both the male parent and the female parent will participate in the control.

There will be explicit and implicit problems.

If the paternal parent is dominant, it is manifested as the paternal parent.

So, it doesn't matter how much genetic material there is.

Because heredity is mainly related to the nucleus, not much to do with the cytoplasm.

The cytoplasm contains very little genetic material The genetic material is mainly found in the nucleus The cytoplasm provides nutrients You say who is more like it It depends on the characteristics of the part you are talking about This is a complex problem You listen to the teacher.

Heredity is divided into dominant and recessive, and inherited is not necessarily manifested.

According to your. Parlance.

And from the perspective of others, you and your father are carried.

Harelip. Pathogenic genes.

Your child has:

Cleft lip and palate. The children of your second grandfather are too, although you and your father and grandparents. People are normal, but they all have disease-causing genes. This leads to the next.

Generation. of pathogenicity.

Based on what you have described, I would not advise you to have any more children.

Morbidity. It's too high, it's not good for yourself and children.

The chromosomes in the nucleus are the main aspects that determine a person. Chromosomes in the cytoplasm have a role in mitochondria.

Chromosomes express proteins in rows

The law of linkage and crossing-over of genes is defined as:

During the formation of germ cells, genes located on the same chromosome are linked together and passed on as a unit, which is called the linkage law. During germ cell formation, there can be an exchange between different pairs of alleles on a pair of homologous chromosomes, known as the exchange law or exchange law.

It is one of the three laws of genetics. The other two laws are the law of segregation of genes (Mendel's first law) and the law of free combination of genes (Mendel's second law). Interlocking and interchange are common phenomena in the biological world, and they are also one of the important causes of biodiversity.

In general, the farther apart the two pairs of alleles, the greater the chance of exchange, i.e., the higher the exchange rate; Conversely, the closer they are, the lower the exchange rate. Thus, the exchange rate can be used to reflect the relative distance between two genes on the same chromosome. When the recombination rate is 1%, the distance between the two genes is recorded as 1 centimorgan (cm).

Pprraa and Pprraa were crossed, F1 was Pprraa, and the proportion of wheat obtained by F1 inbred was 3 4 times 3 4 times 3 4 by 3 4 4, that is, 27 64, and the ratio of homozygous Mao Ying, rust resistance, and no mangs (Pprraa) was 1 4 times 1 4 times 1 4, that is, 1 64, so the proportion of homozygous Mao Ying, rust resistance, and no mangs accounted for the phenotype of Mao Ying, rust resistance, and no mangs was 1 27, so the ratio of Mao Ying, rust resistance, and no mangs ( pprraa), at least 10 wheat, p-r-a-free (p-r-a-) wheat with the phenotype should be selected in the F2 population, and the expression type should be at least 1 divided by 1 27, that is, 270 plants.

There are better formulas:

Creating something out of nothing is hidden, and giving birth to a girl is often hidden".It means that the disease-free parents give birth to a sick child, and this genetic disease is a recessive genetic disease; If a diseased daughter is born, the disorder is autosomal recessive.

There is no dominance in the middle of life, and the disease of the birth of a girl is often obvious".It means that the sick parents give birth to a disease-free child, and this genetic disease is a dominant genetic disease; If a disease-free daughter is born, the genetic disorder is autosomal dominant.

Through these two formulas, the autosomal genetic disease can be eliminated.

As for companion inheritance, there is also a formula:

In the case of recessive inheritance, "the mother and the child will be sick, and the female and the father will be sick".The reason is that the mother has the disease, and both of her X chromosomes carry a recessive pathogenic gene, and there must be a recessive pathogenic gene that is passed on to her son (genotype XY) along with an X chromosome, and the son's Y chromosome has no relative equivalent action, and a recessive pathogenic gene causes the male to manifest the disease. In the same way, when a daughter is sick, both of her X chromosomes carry a recessive pathogenic gene, and there must be a recessive pathogenic gene that was passed on to her by her father (genotype XY) along with an X chromosome.

In general, in the pedigree with X recessive, if a woman has a disease with X recessive, her father and her son should be the patients. And in the pedigree with x recessive, the incidence is more common in males than females.

In the dominant inheritance with x, "the mother will be sick, and the father and daughter will be sick".The reason is similar, in the pedigree with X dominant, if a man suffers from a sex X dominant genetic disease, his mother and his daughter should be the patient. And in pedigrees with x-dominant inheritance, the incidence is more common in females than males.

In Y-chromosome genetic diseases, it is manifested as a disease that only occurs in males, and it is passed from father to son, from child to grandchild, and there is no end of children and grandchildren.