High school biology, how to separate homologous chromosomes in tetraploids

Separation in pairs, one cell enters two chromosomes, and there is no difference from the normal way.

It is the silk of the spindle that speaks of them to the poles.

Summary. First of all, the book only talks about a part, but we have another part, which is not covered at all, because it is rarely used, so we can't go according to what the textbook says, we need a better comprehensive understanding

A tetraploid will have two homologous chromosomes at the same level when producing gametes, but doesn't the book say that homologous chromosomes are separated?

First of all, the book is only a part of it, but we have another state talk about it, and it is not talked about at all, because it is rarely used, so Chunzai said that we can't go according to what the textbook says, and we need a better comprehensive understanding

Can you say the details?

OK. Look at it, what exactly is this question? And he's definitely a little different from the textbook, and if you tie the two together, you'll definitely understand.

If I tell you now, and you don't understand it after you hear it, then wouldn't I have said it in vain? Because when it comes to talking, I'm afraid you won't understand.

There is a problem with your statement.

The number of chromosomes in a gamete is half that of a somatic cell, for example, if a somatic cell contains 4 chromosome sets, then the gamete will contain two chromosome sets, which will contain homologous chromosomes; Whereas, haploid is an individual that develops from gametes, and if the gamete contains homologous chromosomes, the haploid will also contain homologous chromosomes.

Homologous chromosomes are generally distinguished by morphology and size. If the morphology and size are basically the same, it can be concluded that the chromosomes are homologous to each other.

Yes. Homologous chromosomes are a pair of chromosomes that are combined with the paternal and maternal parents, while haploids are directly developed from gametes without sperm-egg union, so haploid organisms do not have homologous chromosomes.

Not necessarily, if a haploid contains 2 or more sets of chromosomes, it is possible to have homologous chromosomes.

Haplotype: refers to the number of homologous chromosomes within a cell.

The homologous chromosome association with the Yukong Shed source is exactly the same as the diploid. （）

a.That's right. b.Mistake.

Correct Answer: Town Rule B

Homologous chromosomes.

is the relationship between x and x between xx.

Sister chromatids.

is the relationship between two i's in x.

Non-homologous chromosomes.

is the relationship between xx and xx.

It's already very vivid, right?,I don't know how to ask again.。

Homologous chromosomes are identical in morphology and size, one from the father and one from the mother.

A sister chromatid is a chromosome that is duplicated from a chromosome.

A non-homologous chromosome is not a homologous chromosome.

The sister chromatids have two parts, connected by the same centromere, which are produced by replication and are identical. Homologous chromosomes are chromosomes, so they have the structure of all chromosomes, have centromeres, and form chromatids after replication. Homologous chromosomes are two chromosomes that are similar in size, shape, and length from the father, and one from the mother, so it can be said that these two chromosomes are homologous chromosomes to each other.

Non-homologous chromosomes are chromosomes that are non-homologous to each other except those that are homologous to each other. Then there are two homologous chromosomes, because they are mutually beneficial, two refers to two centromeres, and one centromere has two chromatids that are sister chromatids to each other, then we know that the sister chromatids are contained in the homologous chromosomes.

Haploid contains two sets of chromosomes, and somatic cells contain homologous chromosomes within them.

Strictly speaking, the concept of homologous chromosomes is introduced in the context of diploidy, and two conditions must be met: one from the father and one from the mother; The shape and size are similar.

However, if the number of chromosomes is doubled by colchicine treatment, the chromosomes can also be regarded as homologous chromosomes.

The genome is the simplest form of an organism's genes, such as; AAABBB, the chromosome set is AB, which contains three; aaabbbc, which is aaabbbc, contains only one; aaabbbcc, also only one; AAABBBCCC, which is ABC, contains three.

Haploid is one that contains only one set of chromosomes, and polyploid contains multiple sets of chromosomes. AABB, chromosome group: AB, is diploid; AABBC, chromosome set: AABBC, is haploid.

For example, a human being is a diploid organism, the homologous chromosome has two chromosomes, there are 23 pairs of homologous chromosomes, the chromosome group has two sets of 23 chromosomes each, and the triploid has three chromosome groups. Haploids develop from gametes, and polyploids develop from fertilized eggs.

2.If the genotype is tetraploid of aaaabbbb, his haploid genotype is aabb, and colchicine treatment is tetraploid of genotype aaaabbbb.