Example 2 In example 2, only one parent (the father) has a copy of the recessive allele (Ff). There is no chance of them producing a child with cystic fibrosis.

Boston Children's Hospital. "Rare recessive mutations pry open new windows on autism." ScienceDaily. ScienceDaily, 22 June 2019. <www.sciencedaily.com / releases / 2019 / 06 / 190620155659.htm>.

So really, this is an example of co-dominance — like a colour-coding allele combining with a low-dose variant to produce a pink flower instead of a red one.

Researchers identified that individuals with a deficiency of myeloid differentiation primary response 88 (MyD88) and interleukin-1 receptor-associated kinase 4 (IRAK-4) due to an autosomal ...