Correct: dominant alleles mask recessives, heterozygous describes genotypes, recessive alleles need 2 in order to be expressed, homozygous means both alleles are the same, phenotype is the physical feature, Rr = heterozygous, RR = homozygous dominant, rr = homozygous recessive, Rr means dominant trait shows up, rr means recessive trait shows up, RR X rr = 0 chance of recessive trait, Incorrect: dominant alleles are masked by recessives, homozygous describes phenotypes, recessive alleles only need 1 to be expressed, heterozygous means both alleles are the same, genotype is the physical feature of an organism, Rr = homozygous dominant, RR = heterozygous, rr = heterozygous recessive, Rr means recessive trait shows up, rr means no trait appears, RR X rr = 100% chance of recessive trait,

Mendelian Genetics Review

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