AP BIOLOGY

HEREDITY

LAW OF SEGREGATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
One gene from a pair is called an
A
Trait
B
Allele
C
Genotype
D
Phenotype
Explanation: 

Detailed explanation-1: -An allele is one of two or more versions of DNA sequence (a single base or a segment of bases) at a given genomic location. An individual inherits two alleles, one from each parent, for any given genomic location where such variation exists. If the two alleles are the same, the individual is homozygous for that allele.

Detailed explanation-2: -Variants of genes is an allele. All alleles give the information of one gene. So, alleles are different forms of the same gene. Thus, a pair of genes is called pair of alleles and it is referred as genotype.

Detailed explanation-3: -Well, alleles are matching genes; one from our biological mother, one from our biological father. We have two copies of every gene (strings of code that drive some biological function on our chromosomes). They can be identical, but they can often have slight differences.

Detailed explanation-4: -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.

Detailed explanation-5: -Genes come in different varieties, called alleles. Somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism.

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