|Role||Genes determine individual traits||Alleles contribute the diversity in phenotype expression|
|Determines||An organism’s genotype||An organism’s phenotype|
|Number per genus locus||One||Two|
|Various Types||Alleles||Paternal vs maternal Dominant vs recessive|
What does the allele do?
Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive. When an organism is heterozygous at a specific locus and carries one dominant and one recessive allele, the organism will express the dominant phenotype.
How do alleles work?
An allele is one of two or more versions of a gene. An individual inherits two alleles for each gene, one from each parent. If the two alleles are the same, the individual is homozygous for that gene. If the alleles are different, the individual is heterozygous.
What is allele simple?
Allele, also called allelomorph, any one of two or more genes that may occur alternatively at a given site (locus) on a chromosome. Alleles may occur in pairs, or there may be multiple alleles affecting the expression (phenotype) of a particular trait.
How do multiple alleles work?
Multiple alleles is a type of non-Mendelian inheritance pattern that involves more than just the typical two alleles that usually code for a certain characteristic in a species. … Sometimes, one of the alleles is completely recessive to the others and will be masked by any of those that are dominant to it.
What do alleles affect?
Genes do control different traits of an organism, such as hair color or eye color, but the actual expression of a trait depends on which allele is dominant. For example, the gene for eye color in humans can have an allele for brown eyes and an allele for blue eyes, or an allele for brown eyes and one for green eyes.
How are alleles passed on to the offspring?
One allele for every gene in an organism is inherited from each of that organism’s parents. In some cases, both parents provide the same allele of a given gene, and the offspring is referred to as homozygous (“homo” meaning “same”) for that allele.
What are the alleles of the parents?
Each parent contributes one allele to each of its offspring. Thus, in this cross, all offspring will have the Bb genotype. Each parent contributes one allele to each of its offspring. Thus, in this cross, all offspring will have the Bb genotype.