What is a Gene? Flashcards
1
Q
a Gene
A
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. humans have between 20,000 and 25,000 genes. Each chromosome contains many genes
2
Q
How many copies of each gene does a person have?
A
- one inherited from each parent
3
Q
Alleles
A
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
