Is there an allele on the same chromosome

Chromosomes are present in pairs, and the alleles are on one of the chromosomes. For example, if there is a gene A or A on one chromosome, then there will be a gene A or A on the other chromosome. An allele is one that controls the same trait, such as the color of the hair, but the thickness or length of the hair is another gene.

The white hair gene and the black hair gene mentioned by the landlord are not alleles on the same chromosome, because a pair of alleles is on one of the same chromosomes.

In AABB, A and A are a pair of alleles, and B and B are a pair of alleles. The so-called control of the same trait, for example, A controls the color of the hair, while B controls the length of the hair, both of which control the traits of the hair. ok.

Complete! If the landlord has any questions, he can also help, I wish you progress in learning! I only took the college entrance examination last year, alas, I almost forgot a lot of things!

The concept of alleles: genes that are located in the same position on homologous chromosomes and control relative traits. There are two main points.

1. Same position: the same position of homologous chromosomes.

2. Control relative traits.

For example, the Aa and BB you mentioned are two pairs of alleles, but although A and B control a pair of relative traits, they are not genes in the same position on the homologous chromosome.

AA is also not an allele because they are genes on homologous chromosomes that control the same (not relative) traits.

An allele generally refers to a pair of genes located in the same position on a pair of homologous chromosomes that control relative traits. It may appear in one of two or more genes on a specific locus on the chromosome.

If a gene at an allele locus on one chromosome exists in more than two states, it is called a complex allele.

It is an allele, and the 4 are called complex alleles.

1.The white hair on one of the chromosomes you are talking about may be a complex allele.

This. 2.A and a are a pair of alleles, and b and b are a pair of alleles.

The gene that controls the relative trait is called an allele, and A and A control the same trait is not called an allele! It's called the same gene!

There is no one, and the allele is located in the same place on a pair of homologous chromosomes.

Summary. An allele is a gene that is located at the same position on the homologous chromosome that controls a pair of relative traits, but the gene at the same location on the homologous chromosome is not necessarily an allele, or it may be the same gene A chromosome group refers to a group of non-homologous chromosomes in a cell, which are different in morphology and function, but carry all the information that controls the growth, development, inheritance, and variation of an organism The characteristics of the chromosome set are that it does not contain homologous chromosomes and does not contain alleles

Is the same position on a homologous chromosome necessarily an allele? Is it possible that they are the same gene? Why?

An allele is a gene that is located at the same position on the homologous chromosome that controls a pair of relative traits, but the gene at the same location on the homologous chromosome is not necessarily an allele, or it may be the same gene A chromosome group refers to a group of non-homologous chromosomes in a cell, which are different in morphology and function, but carry all the information that controls the growth, development, inheritance, and variation of an organism The characteristics of the chromosome set are that it does not contain homologous chromosomes and does not contain alleles

Why the same location genes on homologous chromosomes may be alleles or may be identical genes.

It's clear that it can be the same person, or it can be said to be a different person.

The same people are the same genes? Different people are waiting? Why?

You have the same genes as your relatives, can you have the same genes as other children? It's not the same.

Is the gene mutation the cause of the allele?

Genetic mutations are usually serious illnesses and interest rates rise.

Can you explain that clearly?

The general mutation is the y-body. The X body has never changed.

First, the allele is located on the homologous chromosome.

2. Explanation of terms: Alleles refer to genes located in the same position of a pair of homologous chromosomes that control different forms of the same trait.

3. Extended content:

1. Different alleles produce changes in genetic traits such as hair color or blood type. Alleles control the dominant recessive relationship and genetic effects of relative traits, and alleles can be divided into different classes.

2. In an individual, one form of allele (dominant) can be expressed more than other forms (recessive). For example, the locus of the human Rh blood group gene is in the 3rd region 5 band of the short arm of chromosome 1, and RH and RH in the same position of two chromosome 1 are a pair of alleles.

1. In the same position, that is, in the same position of the homologous chromosome, for example, the position of the two black arrows in the figure below:

One homologous chromosome comes from the paternal parent and one from the female parent; They are identical in shape, size, and structure. Since the number of chromosomes of each organism is constant, so is the logarithm of their homologous chromosomes.

2. Not the same gene.

The DNA sequences of the two monosomy of the homologous chromosome are not the same, and they are different from the parents.

Alleles can be located on the same chromosome.

An allele is a gene located at the same location on a pair of homologous chromosomes that controls the different morphologies of a trait.

By definition, alleles are located on homologous chromosomes, at least originating from homologous chromosomes.

However, taking into account individual differences in chromosomal variation, such as translocation of non-homologous chromosome segments, it is possible to distribute alleles between non-homologous chromosomes.

a. Genes with the same position on the same pair of homologous chromosomes are not necessarily alleles, but may also be the same genes, a is wrong;

b. Allele refers to a gene that controls relative traits in the same position of a pair of homologous chromosomes, b correct;

c. The allele is on the homologous chromosome, not on the two chromatids of the same chromosome, c is wrong;

d. The allele is on the homologous chromosome, not on the two chromatids of one chromosome, d is wrong

Non-allelic genes: genes located at different locations on homologous chromosomes or on non-homologous chromosomes.

An allele is a gene that is located in the same position on the same chromosome and is a gene that determines the relative trait, which refers to the gene that is located in the same position on a pair of homologous chromosomes to control the different morphology of the same trait. There are two conditions for an allele to be met:

1. The homologous chromosomes are in the same position.

2. Determine relative traits (one is a dominant gene and the other is a recessive gene).

Alleles are homologous chromosomes.

genes that determine relative traits refer to genes that control different morphologies of the same trait at the same position on a pair of homologous chromosomes. There are two conditions for an allele to be met:

1. The homologous chromosomes are in the same position.

2. Determine relative traits (one is a dominant gene and the other is a recessive gene).