High school sophomore biology ask for help!!

The answer above is wrong.

Believe me, I'm an undergraduate student majoring in bioengineering.

The genetic code is also known as codons, which I don't need to explain.

So the answer is B

Trust me, there's nothing wrong with that.

I choose BGenetic information, i.e., the order in which the bases of DNA are arranged. The use of DNA probes is to use the principle of base complementary pairing to find the sequence that can complement the probe.

Choose A, the DNA probe is actually a base chain, and it is used to complement and pair with the detected gene, so as to achieve the purpose of detection, so that he can detect the genetic code - DNA

b is definitely b

The genetic code is on mRNA. Needless to say, right?

A DNA probe is a single-stranded DNA molecule that is used to detect genes.

It must be a genetic code, look at the "Expression of Genes" section in the book.

A supporting B DNA probe is an inverse sequence of genetic information, and as long as the tested sequence is fully bound to it, it indicates that it contains the gene.

I think I should also choose B, I'm also in the biology department, it should be B, I'm not sure, but my knowledge tells me it's B

In general, a plasma cell can only secrete one type of antibody.

B These two types of diabetes are autoimmune diseases, this sentence is easy to understand, the first is the antibody secreted by a cell to attack the glucose receptor on the membrane of pancreatic B cell cell, which means that the antibody attacks the cell secreting insulin, destroys the glucose receptor of pancreatic B cell cells, so that the cell can not use glucose, starvation to death. As a result, the body cannot produce insulin, but it can be injected outside the body.

c The cells that produce antibodies are plasma cells and do not have the recognition function, only B cells, T cells, etc. have the recognition function.

d The insulin produced by pancreatic B cells binds to receptors on the target cell membrane, indicating that the cell membrane has the function of information transmission, which is obviously correct.

a.A plasma cell can secrete only one type of antibody.

First of all, you need to understand that the meaning of recombinant shape is that there is a status quo that has not existed before. For example, the large fruits (aa, aa) and small fruits (aa) of a plant are a pair of relative traits, and the seeded (bb, bb) and seedless (bb) are a pair of relative traits, and they are not related to each other. If the maternal trait is large fruit and seedless, then the offspring with small fruit without seeds is called a recombinant trait.

This is because the traits of the offspring and the mother reflect a recombination.

It can be seen from the question. If the mothers are AABB and AABB

The F1 trait is AABB

The selfbred genomes were 1 4aa 1 2aa 1 4aa1 4bb 1 2bb 1 4bb

The F1 generation traits are large fruits and seeds. If the F2 generation trait has small fruits, seeds or large fruits, and no seeds, it is a recombinant trait (different from the parent and F1 generations).

Small fruits, seeded (AAB-) = 1 4 x 3 4 = 3 16 large fruits, seedless (a-bb) = 3 4 x 1 4=3 16 probability = 3 16 + 1 16 = 3 8

If the mothers are AABB and AABB

Then the following algorithm is the same, and the probability is 5 8

Biology is actually relatively a routine question, I wish you all the best in your studies.

Is there a relationship between this genetic factor and the XY chromosome... It's not the same on the sex chromosomes as it is not.