Blonde hair and red hair are recessive traits, meaning that they require two homozygous recessive alleles to be expressed (in this case, bb or rr). What hair color would the child of a blonde and redhead have since there is a 100% chance of them being br? Would one recessive allele dominate over the other? Are there real life examples of blonde + redhead and what were the resulting children?
I am absolutely not a scientist/geneticist so please be correct any factual inaccuracies I may have made!!
In: Biology
While the whole “dominant and recessive” thing is super useful for learning the concepts, the reality is that genes are way more complex and tend to be a mixture of like, kind of dominant and kind of recessive but sometimes they both express to some degree. There are [at least 124 genes that contribute to hair color](https://www.sciencedaily.com/releases/2018/04/180416121600.htm). Ultimately, it comes down to the very unique combination in that person.
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