Question

Different forms of gene are called as
(A) Heterozygotes
(B) Alleles
(C) Character
(D) Traits

Answer 1

Hint: Gene is the essential physical and functional unit of heredity. They are made up of DNA. Some genes act as instructors to make molecules called proteins. However, many genes do not code for any proteins.

Complete answer:
An allele is a variant form of a gene. Some genes have a variety of different forms, which are situated at the same position, or genetic locus, on a chromosome. Humans are also called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.

Example: A, B and O genes are alleles. An allele is a viable DNA coding that involves a given locus on a chromosome. Generally alleles are sequences that code for a gene, but sometimes the term is used to refer to a non-gene sequence. So, option (B) is correct.

> Option (A) is incorrect because Heterozygotes are organisms with a pair of contrasting characters.
> Option (C) is incorrect because Character is an observable feature, or trait, of an organism.
> Option (D) is incorrect because trait is a specific characteristic of an organism.

Additional information:
Genetics is the study of heredity, which means the passing of traits from parent to offspring.

Note:
- Each pair of alleles represents the genotype of a specific gene. Genotypes are depicted as homozygous if there are two identical alleles at a specific locus and as heterozygous if the two alleles differ. Alleles contribute to the organism's phenotype, which is the outward appearance of the living being.
- A few alleles are dominant or recessive. When an organism is heterozygous at a particular locus and carries one dominant and one recessive allele, the organism will express the dominant phenotype. Alleles can likewise refer to minor DNA sequence variations between alleles that do not necessarily influence the gene's phenotype.