e. Non-Mendelian Genetics
FSI Video Notes: Non-Mendelian Genetics (Georgia Biology Milestones)
SB2: Explain the role of DNA in storing & transmitting genetic information • Patterns of inheritance beyond Mendel
Incomplete Dominance (blended)
Codominance (both show)
Multiple Alleles (A, B, O)
Sex-Linked Traits (X-linked)
Guided Notes Fill-in-the-Blank
Mendel’s patterns are a starting point, but the Milestones often tests inheritance that does not match a simple 3:1 ratio. When phenotypes look blended, both show at once, or traits are tied to sex chromosomes, you’re likely in Non-Mendelian territory.
1) In incomplete dominance, the heterozygous phenotype is ____________.
Hint: looks like a “mix” of the two traits.
2) In codominance, ____________ alleles are fully expressed at the same time.
Hint: not blended—both show.
3) Multiple alleles means there are more than ____________ possible alleles for a gene in a population.
Hint: the usual number is two.
4) A common multiple-allele example is ____________ blood type (A, B, O).
Hint: ABO.
Tip: capitalization doesn’t matter.
5) Sex-linked traits are often located on the ____________ chromosome.
Hint: males have only one of these.
6) Males are more likely to show X-linked recessive traits because they have only ____________ X chromosome.
Hint: the number is 1.
Notes Score: 0/6
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