how many different alleles of a gene can exist in a population? In a single bacteria? in a single human? Expla

Answer 1

1. There can be many different alleles of a gene in a population if it is a gene that exists in many different forms. A population is made up of all the members of that species in an area. If a gene has three alleles, all three of the alleles can be in the population in varying percentages.
2. Bacteria are haploid because they have a single circular chromosome. Bacteria have only one allele for each gene.
3. In a human - two alleles of the gene because humans are diploid and have an allele from each parent.

Answer 2

In basic genetic studies most genes have only two alleles in any organism. The alleles are the A and a in many questions. This give three possible genotypes AA Aa aa. Some genes have more than two alleles such as the human gene for blood type. /A /B /O which results in four phenotypic possabilties:

A Blood type: /A/O, /A/A
B Blood type: /B/O, /B/B
O Blood type: /O/O
AB Blood type: /A/B

Any organism (bacteria to human) can have any number of alleles for any one gene.

Answer 3

Normally one would believe that a "less fit" allele would eventually disappear from a population over time. However, to put in simply, alleles come in two forms: dominant and recessive. When an individual in a population carries a recessive allele, he does not express the trait that allele codes for, and is not subject to forces of selection for that particular allele. Therefore, the allele can be successfully passed on. Many different alleles survive through this process.

Answer 4

No, that's impossible for 2 people to have each gene. If that replaced into remarkable, Adam could have been an anemic, club footed, midget with a defective palate. Human chromosomes have a finite volume of area. there are particular loci (or places) the place particular features are located. for each loci, there are diverse alleles (varieties a particular gene) which could be present day there. There a many many diverse alleles for each particular trait, working example eye coloration, tumor suppression, and sickle cellular anemia. that's impossible for somebody to have each and each allele. you would be quadrupling the size of their genetic code and Cain and in a position does no longer have been born. in spite of the fact that, Christian "Scientists" argue that Adam and Eve have been created with organic genes as replaced into the backyard of Eden and it wasn't till they ate the forbidden fruit did they develop into unclean. After that, commonly used mutations began and the sluggish march unto the genetic pool we've today began.