cell division that produces sex cells, which have half the number of chromosomes of body cells (there are 23 chromosomes in human sex cells) a section of DNA that codes for a certain protein changing the genes of an organism organisms that have had their genes changed in order to change a characteristic

1. meiosis

cell division that produces sex cells, which have half the number of chromosomes of body cells (there are 23 chromosomes in human sex cells)

2. gene

a section of DNA that codes for a certain protein

3. genetic engineering

changing the genes of an organism

4. genetically modified organisms

organisms that have had their genes changed in order to change a characteristic.

5. genotype

the genes that an organism has for a trait. Tt, for example.

6. heterozygous

two different alleles for a trait. Gg, for example

7. homologous chromosomes

pairs of chromosomes that contain genes controlling the same traits. We have 23 pairs of homologous chromosomes.

8. homozygous

two of the same alleles for a trait. Examples- GG or gg

9. inherited trait

a characteristic controlled by genes. Eye color, for example

10. mutation

a change in the order of bases in DNA, which could result in a change in the protein being produced. There are insertion, deletion and substitution mutations.