Examlex
What do geneticists use along with historical records to track traits through many generations of a family?
Fertilization
The union of the ovum and sperm.
Recessive
Pertaining to a gene that is expressed in the phenotype only when its allele is identical, needing two copies (one from each parent) to exhibit the trait.
Dominant
Referring to a trait, gene, or characteristic that supersedes another in genetic expression when both are present.
Ovum
The female sex cell, or egg.
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