Examlex
Which of the following statements about family reactions is true?
Dominant Alleles
Alleles that mask the effect of other alleles for the same gene in heterozygous individuals, determining the phenotype.
Recessive Alleles
Genetic variations that must be present in two copies (homozygous) to express a trait, as opposed to dominant alleles that require only one copy.
Epistasis
An interaction between genes where the presence or absence of alleles of one gene influences the expression of another gene.
Alleles
Alleles are alternative forms of a gene that arise by mutation and are found at the same place on a chromosome, contributing to genetic variation in populations.
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