|genotype||the genetic makeup|
|homozygous||an organsm with two alleles for a trait that are exactaly the same|
|heterozygous||an organism that has two different alleles for a trait|
|phenotype||the physical trait that shows as a result of a particular genotype|
What has two alleles for a trait?
An organism which has two different alleles of the gene is called heterozygous. Phenotypes (the expressed characteristics) associated with a certain allele can sometimes be dominant or recessive, but often they are neither.
What are the two alleles?
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.
Why are there 2 alleles for each trait?
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.
What are the alleles for a trait?
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.
What is a hidden trait called?
An organism receives two genes for each trait, one from each parent. … The trait of the weaker gene is “hidden” or does not show up and is called the recessive gene.
How are alleles named?
Allele designations appear as superscripted short alphanumeric strings following the gene symbol of which they are an allele and serve as an acronym for the allele name. … Allele designations begin with a lower case letter if the allele is a recessive and begin with a capital letter otherwise.
What pairs of alleles determine?
The pair of alleles present on an individual’s chromosomes dictates what eye color will be expressed.
Who is known as the father of genetics?
Gregor Mendel. Gregor Mendel’s work in pea led to our understanding of the foundational principles of inheritance. The Father of Genetics. Like many great artists, the work of Gregor Mendel was not appreciated until after his death.