Why are red hair people called ginger?
I believe it's because certain people have the chromosome 16 and also have two copies of a recessive allele.
How rare is it to have red hair?
It usually only happens in one or two percent of the population.
What are more common hair colors?
Typically if there is more melanin present the color of the hair is darker.
Why do people with red hair have freckles?
Freckle
Freckles are clusters of concentrated melaninized cells which are most easily visible on people with a fair complexion. Freckles do not have an increased number of the melanin-producing cells, or melanocytes, but instead have melanocytes that overproduce melanin granules (melanosomes) changing the coloration of the outer skin cells (keratinocytes). As such, freckles are different from lentigines and moles, which are caused by accumulation of melanocytes in a small area.
Freckles can appear on all types of skin tones. Of the six Fitzpatrick skin
Red hair
Red hair (or ginger hair) occurs naturally in one to two percent of the human population, appearing with greater frequency (two to six percent) among people of Northern or Northwestern European ancestry and lesser frequency in other populations. It is most common in individuals homozygous for a recessive allele on chromosome 16 that produces an altered version of the MC1R protein.
Red hair varies in hue from a deep burgundy or bright copper (auburn) to burnt orange or red-orange to and strawberry blond. Characterized