How do you know your allele?

How do you know your allele?

These 3 alleles can determine 4 different blood groups:

1. If two alleles are A: the blood group is A,
2. If two alleles are B: the blood group is B,
3. If a allele is A and the other B: the blood group is AB,
4. If a allele is A and the other O: the blood group is A,

What is the difference between an allele and a chromosome?

– One chromosome : is of DNA associated with proteins. – A gene : is a portion chromosome which determines a hereditary character. A gene therefore contains a part of hereditary information. – One allele : each gene exists in different versions called alleles.

How to explain the appearance of new characters in a population?

According to the theory of natural selection, individuals with characters beneficial to survival in a specific environment see their population to augment. Of new characters may appear as a result of a spontaneous change in genetic information.

What is the origin of the alleles of the same gene?

The essential has a embarrassed can correspond to two versions or alleleswhich occupy the same position on each of the two chromosomes of a pair. – If both alleles from gene are identical, the hereditary character determined by these alleles will necessarily be expressed.

How to determine genotype and phenotype?

An individual with a phenotype dominant can be homozygous or heterozygous. For determine his genotype, it is crossed with a homozygous recessive individual. Case with a single gene and 2 alleles: G dominant and G recessive. The homozygous recessive individual of genotype gg provides only one type of gamete: g.

How to describe a phenotype?

the phenotype refers to the multiple observable characteristics of individuals. It results from the expression of genes modulated by certain environmental factors. It is described at different scales of organization of the living world: organism, cell, molecule.

What are the different types of alleles?

People with two copies of the “normal” allele have disc-shaped red blood cells. People with one sickle allele and one normal allele have a low number of sickle cells, and their sickle cells more easily in certain conditions.

What is the difference between a gene and an allele?

In sexually reproducing organisms, each parent donates one allele for each gene, giving offspring two alleles per gene. Because alleles are just variants of specific genes, different alleles are found in the same locations on the chromosomes of different individuals.

What is the phenotype of the dominant allele?

An individual with one dominant allele and one recessive allele for a gene will have the dominant phenotype. They are generally considered to be “carriers” of the recessive allele: the recessive allele is there, but not the recessive phenotype. Keep in mind that the terms are confusing and often misleading!

What are non-functional alleles?

These mutations cause the appearance of non-functional alleles, as is the case in cancers. Some cancers are caused by mutations in tumor suppressor genes, which regulate the size, shape and growth of individual cells.