#bio examples

[er-cryptid]

Post-Zygotic Barriers Examples

Reduced Hybrid Viability -- the offspring dies early -- may be due to deformity -- may be due to parental care behaviors -- example: when some frogs and salamanders interbreed

Reduced Hybrid Fertility -- offspring are sterile -- example      -- mule      -- liger -- meiosis in the hybrids fails to make normal gametes

Hybrid Breakdown -- the hybrid is fertile, but only them -- example: cotton plants -- later generations are sterile or not viable

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[er-cryptid]

Incomplete Dominance vs Codominance

-- incomplete dominance      -- phenotype of a heterozygote is intermediate between the two homozygous parents      -- example: a red flower and a white flower make a pink flower

-- in incomplete dominance, neither allele is dominant

-- codominance      -- phenotypes of both homozygous parents are produced in heterozygous offspring      -- example:  a white cow and a black cow produce a black and white cow

-- in codominance, both alleles are equally dominant