Human Genetics. Multiple Alleles. There are more than two possible genes that can be inherited for a trait. Examples Flower color Blood type. Sex-linked Traits. Trait for which the gene is located on one of the sex chromosomes. X H X H ~ female, normal
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XHXH ~ female, normal
XHXh ~ female, normal carrier
XhXh ~ female, hemophiliac
XHY ~ male, normal
XhY ~ male, hemophiliac
Colorblindness is sex-linked.
Blue box is colorblind
White box is normal vision with two normal genes.
Half blue/half white is a carrier with normal vision, but one abnormal gene.
Female – 2 X chromosomes