What is gene and allele class 12 biology?

What is gene and allele in biology?

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

What is an allele in biology class 12?

An allele is an alternative form of a gene. It is located at a specific position on a specific chromosome. These can be passed on from parents to offspring through sexual reproduction.

What is a gene Class 12?

A gene is defined as the basic physical and functional unit of heredity. The definition of a gene states that it is the basic physical and functional unit of heredity. Genes, structurally are made up of nucleotides called DNA.

What is an allele simple definition?

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 allele in biology BYJU’s?

Alleles are alternative forms of a single gene, which code for a pair of contrasting traits. These alleles contribute to the diversity in phenotype expression. An individual contains a pair of alleles for a particular gene and are located in the same place on a chromosome.

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What is a gene Class 10?

A gene is a small portion of the DNA, with codes for a particular polypeptide or a protein. In other words, it is the functional unit of the DNA. It is also responsible for the transmission of hereditary characters from the parents to the offspring.

What is a gene Class 5?

Genes carry the information that determines your traits (say: trates), which are features or characteristics that are passed on to you — or inherited — from your parents. Each cell in the human body contains about 25,000 to 35,000 genes.