How many alleles does hemoglobin have?
Everyone inherits two alleles of HBB, and be- ta-globin protein is normally made (expressed) from both. The HBB alleles that a person has in- fluences how much and what type of beta-globin protein they make.
Can a gene have 4 alleles?
A given gene may have multiple different alleles, though only two alleles are present at the gene’s locus in any individual.
What are the genes for hemoglobin?
The genes which direct the structure of human fetal and adult haemoglobin consist of a linked pair of alpha-chain loci on chromosome 16 and the G gamma-A gamma-delta-beta loci complex on chromosome 11. The delta-and beta-chain genes contain inserts similar to those of the mouse and rabbit globin genes.
What is the maximum number of alleles for the hemoglobin gene each person can have?
Although individual humans (and all diploid organisms) can only have two alleles for a given gene, multiple alleles may exist at the population level such that many combinations of two alleles are observed.
Why do we have 2 alleles for each gene?
Since diploid organisms have two copies of each chromosome, they have two of each gene. Since genes come in more than one version, an organism can have two of the same alleles of a gene, or two different alleles. This is important because alleles can be dominant, recessive, or codominant to each other.
How many combinations of 4 alleles are there?
4 alleles there are 1 + 2 + 3 + 4 = 10 genotypes.