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(#8) Being Tall
Yes, being short is actually a dominant trait. But one gene alone doesn't determine height - thousands of genes are thought to contribute.
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(#15) Colorblindness
While several factors can contribute to colorblindness, the overwhelming majority of cases, which involve red-green colorblindness, are inherited. This form of colorblindness is linked to sex - for every red-green colorblind female, there are roughly 16 red-green colorblind men.
According to Color-Blindness.com: "If one or both of your parents is suffering from some type of color vision deficiency, there is a certain chance that you or your children will have the same vision handicap."
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(#6) Susceptibility To Poison Ivy
An immunity to poison ivy is actually a dominant trait.
Still, roughly 85% of the population shows the recessive trait and is allergic to poison ivy, and 50 million Americans per year have the rashes to prove it.
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(#7) Non-Freckled Skin
Freckles are cute and kind of rare, but they're also a dominant trait! "If you have an active MC1R gene, your body produces more eumelanin, leading to darker hair and skin that protects against the sun," said "SciShow" host Hank Green.
"If that gene is inactive then you’ll produce more pheomelanin, leading to fairer skin, blonde or red hair and a propensity for freckles."
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(#3) Being Single-Jointed
You probably had some kid in class with you back in elementary school who boasted about being double-jointed. Whether they were telling the truth or not, they were actually bragging about a dominant trait. Having joints like most of the population is actually genetically recessive compared to having joint hypermobility, also called being double-jointed.
This is less likely to affect Europeans, but worldwide about 25% of people are double-jointed, meaning that a whopping three-quarters of us are expressing a recessive trait!
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(#9) Type O Blood
It's pretty common knowledge that type O blood is always in demand because it can coexist with any other blood type, meaning it can be donated to anyone. Type O blood is associated with a recessive gene, so you might think it's harder to find, right?
Nope! Fortunately, type O is the most common blood type.
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About This Tool
Only when the gene is homozygous, the trait determined by the Recessive gene will be expressed. In the heterozygous state, the phenotype of the organism shows the characteristics determined by the dominant gene. Recessive genes in biology are represented by lowercase letters, while dominant genes are represented by uppercase letters. For example, a recessive homozygote is denoted as aa, and a heterozygote is denoted as Aa.
An example of a recessive gene is the blue eyes, which are recessive genes compared to brown eyes. The random tool introduces 15 of the most common recessive genes in humans that you may find in your own body, such as non-fused fingers, type O blood, etc.
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