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An allele is the different forms of a gene. For example the gene for eye colour has the alleles; brown, blue, green etc. In every person there are two alleles for every gene but both alleles are not always the same. They can be dominant and recessive; dominant alleles are expressed no matter what other allele is present, recessive alleles require both alleles to be the recessive one to be expressed. E.g. say B is the allele for brown eyes and b is the allele for blue eyes. Brown is dominant therefore if someone had Bb or BB they'd have brown eyes and if they had bb their eyes would be blue.
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What is Having two unlike genes for the same trait?
When two alleles differ from each other, such as Tt, it is called heterozygous, hetero meaning different. When alleles are the same (TT) it is called homozygous, homo meaning same.
An organism that has two diffrent alleles for a trait?
Is called a heterozygote (hetero- meaning different, and zygote being the sex cell). Heterozygotes have two different alleles of a particular gene, one in each of their sets of chromosomes. As apposed to homozygotes which have two of the same alleles of a gene.
Two identical alleles for a particular gene is what?
I assume that you are looking for the term "homozygous," meaning the two alleles for any given gene are identical.http://en.wikipedia.org/wiki/Zygosity#Homozygous
What happens when both alleles of a gene pair independently express in a heterozygote?
Then a combination of the two visual forms of the alleles (meaning any visual things the alleles cause get combined) is formed. Either that, or one pair dominates the other, and the new person becomes a carrier of the dominated pair.
What is an organism that has two different alleles called?
There are three alleles, the dominant, uppercase 'T', and recessive, 't'. There is also codominance, which is when two separate alleles neither control and create something entirely diffierent ie: Straight haid allels, 'S', and curly hair allele, 'C', create wavy hair. The correct answer to this question is: Heterozygot. An organism with the same alleles at a gene locus is called a Homozygot. Hetero- often meaning "different" as in "Heterosexual -> different sex attraction " and "Homo-" often meaning "same" as in "homosexual -> same sex attraction".
What type of alleles mask recessive alleles?
Dominant alleles :-)
What are the multiple forms of genes called?
Alleles are genes that exist in multiple forms.
What term describes a pair of alleles that are the same?
Alleles that are the same = homozygous Alleles that are different = heterozygous
Two different forms of the same gene are called?
Alleles
What is the difference between heterozygous and homozygous alleles?
You're looking at a gene which contains 2 alleles (meaning variations of that gene). Let's call it "A."Remember that you get 2 copies of EACH gene (one from mom, one from dad).
When more than two different alleles control a trait?
The presence of more than two alleles that control a trait is called multiple allele. An example of this is the group gene of ABO blood that has three alleles.
The number of alleles of a certain type divided by the total number of alleles is what?
Alleles Frequency
