Question

please explain me genes and contents should not be copied from internet otherwise I will report the answer and individual who give answer in his word appropriately will mark as brainliest

thanks

Answer 1

Definition:

A gene is the basic physical and functional unit of heredity.

Made up of?

Genes are made up of DNA.

Size:

In humans, genes vary in size from a hundreds DNA bases to more than 2 million bases.

Explanation:

Every person has two copies of each gene, one inherited from each parent. Most genes are the same in all people, but a small number of genes (less than 1 percent of the total) are slightly different between people. Alleles are forms of the same gene with small differences in their sequence of DNA bases. These small differences contribute to each person’s unique physical features.

Thinking of scientists:

Scientists keep track of genes by giving them unique names. Because gene names can be long, genes are also assigned symbols, which are short combinations of letters (and sometimes numbers) that represent an abbreviated version of the gene name. For example, a gene on chromosome 7 that has been associated with cystic fibrosis is called the cystic fibrosis transmembrane conductance regulator; its symbol is CFTR.

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