Examlex
_________ is the initial event in development.
Mutations
Changes in the DNA sequence of a cell's genome, which can lead to variations in physical appearance, behavior, or health.
DNA Helix
The double-stranded, spiral structure of DNA that carries genetic information necessary for cell growth, division, and function.
Gene
The basic unit of heredity. Genes are composed of deoxyribonucleic acid (DNA).
Zygote
The initial cell formed when a new organism is conceived, created by the merging of female and male reproductive cells.
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