5.4 Non-Mendelian Genetics
Notes
- Linked genes on the same chromosome are inherited together unless crossing over separates them. Recombination frequency estimates distance.
- Sex-linked traits (X-linked) show up more in males.
- Incomplete dominance (blend), codominance (both shown), multiple alleles (ABO), polygenic traits.
- Mitochondrial DNA is inherited from the mother.
Practice
A red and a white flower give pink offspring. This is:
A blend.
A color-blind man ($X^bY$) and a carrier woman ($X^BX^b$): chance a son is color-blind:
Sons get the X from their mother.
Two genes show 8% recombination. They are:
Low recombination means close.
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