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The phenotype of the fruit produced by the plant is: red, thick cotyledons. Because the fruit develops from the ovary of the female parent, the phenotype is determined by the genotype of the female parent.

In theory, the separation ratio of peel color and peel thickness were ?

Answer: AABB AABB

The fruit of the offspring plants is 1 2 for green (aa) and 1 2 for red (aa).Thick-walled (b) accounts for 3 4, thin-walled (bb) accounts for 1 4

Therefore, theoretically the peel color separation ratio is 1:1 for green:red, and the ratio of thick-to-thin separation of the peel is 3:1 for thick-walled:thin-walled skin

Considering separately, first look at the color of the peel, the pollen of AA and the individual combination of AA can only produce two kinds of fruits, AA and AA, and the probability accounts for half, that is to say, the fruit is 50% green and red, and then look at the cotyledons, BB and BB combined, respectively, there are three results: BB, BB, BB probability is 1 4, 1 2, 1 4, which is 3 4 for the cotyledons are thick, and 1 4 for the cotyledons are thin. Therefore, the representative type of fruit is green skin and red skin accounting for half each, theoretically the approved color red to white accounts for 50% and 50% respectively, and the ratio of cotyledons thickness to thinness is 75% for thick and 25% for thin

1. First of all, the fruit of the plant should belong to the ovary wall, so the phenotype is the same as that of the female parent: red thick skin.

2. The gametes produced by the paternal gene are: ab, ab, ab, ab

Female gametes: ab, ab

So the offspring produced are: aabb, aabb, aabb, aabb, aabb, aabb, aabb

It can be seen that the separation ratio of the peel color is 1 2 and the thickness ratio is 1 4, I hope it will help you.

The first question: we need to know that the color of the peel is the same as that of the parents, so the peel of the fruit produced by the plant is all red (aa), and the genotype of the cotyledons is the genotype of the seed, that is, depending on the offspring, so: bb and bb are crossed, and the cotyledons are thick: thin = 3:1.

Therefore, there are two phenotypes of this fruit: red thick: red thin = 3:1.

Question 2: The color of the pericarp of the offspring plants (the color of the pericarp is the same as that of the parent) green:red = 1:1.

Regarding the separation ratio of the thickness of the peel, you don't seem to give it in the title.

Relativity of element b: the content of the same element is different in the cells of different organisms, and there are differences in different tissues and organs of the same organism, even the content of fresh weight and dry weight in the same cell is also different.

Peas are pollinated by closed flowers, so the F1 produced by a row of plants with recessive traits (only possible AA, no other possibilities, no genetic mutation considered) can only be AA, that is, recessive individuals;

Corn is not pollinated in closed flowers, so the F1 produced by a row of plants with recessive traits (which may be AA or AA) may be AA, AA, AA, so it is both dominant and recessive.

The pollination of peas is not affected by pollen from the outside world (other peas), whereas the pollination of corn is affected by pollen from the outside world (other corns).

Inter-row planting means planting in alternate rows.

The point is that peas are pollinated by closed flowers, corn is not pollinated by closed flowers, and you can explain that very clearly upstairs.

The simple understanding is that peas are equivalent to self-breeding and corn is equivalent to hybridization. Pea closed pollination, that is, dominant pollen can not enter the recessive pistil, while corn does not have this phenomenon, and the pea hybridization mentioned in the book is achieved by artificial pollination.

F2 flat disk: shape round: oblong = 9:6:1

According to Mendel's hybridization experiment in the textbook, combined with 9:3:3:1, it can be seen that the flat disk is double-visible, the circle is single-display, and the oblong circle is double-hidden, so the parental circle is: aabb aabb

1.Viruses are a class of organisms (without cellular structure) with the main characteristics:

1) The individuals are small, and most of them must be seen only with an electron microscope.

2) Viruses that have only one nucleic acid, DNA and RNA, and no viruses that contain (two) nucleic acids.

3) Franchise (parasitic) life.

4) The structure is simple, generally composed of nucleic acids (DNA and RNA) and (proteins).

2.Depending on the host of the parasitism, viruses can be divided into three categories: (animal viruses), (plant viruses), and bacterial viruses (i.e., bacteriophages). Depending on the type of nucleic acid contained in the virus, it is divided into DNA virus and RNA virus.

Parasitic primitive simple.

Electron microscope.

One and only two.

Parasitic plant viruses, animal viruses, bacteriophages.

RNA viruses, DNA viruses.

(1) Microscope.

2) One of the two.

3) Parasitism. 4) Protein.

2.Plant viruses, animal viruses, bacteriophage DNA, RNA