What is DNA and genetics?

What is DNA and genetics?

A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. … Alleles are forms of the same gene with small differences in their sequence of DNA bases.

What is bigger DNA or gene?

The other chromosomes are called autosomes. The largest chromosome, chromosome 1, contains about 8000 genes. … (Chromosome 22 should be the smallest, but the scientists made a mistake when they first numbered them!). The DNA that contains your genes is stored in your cells in a structure called the nucleus.

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What is the difference between a gene and trait?

A gene is a portion of DNA that determines a certain trait. An allele is a specific form of a gene. Genes are responsible for the expression of traits. Alleles are responsible for the variations in which a given trait can be expressed.