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Unformatted text preview: Alleles separate before gametes are formed; the principle of segregation A. Alleles- alternative forms of a gene Dominant allele- always expressed when it is present, regardless of it’s state Recessive allele- never expressed in a heterozygous state B. Principle of Segregation- before sexual reproduction occurs, 2 alleles carried by an individual parent must become segregated C. Recessive alleles are not lost and can occur in the F2 generation because of meiosis II. Mendel’s Model of Inheritance A. Alternative forms (alleles) of a “factor” (gene) account for variations in inherited traits....
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- Fall '09
- Genetics, Zygosity, C. Recessive alleles