codominance - having 2 or more alleles that are equally dominant for a trait so that both are expressed
incomplete dominance - Having alleles that do not have complete dominance the resulting trait is a mix
of two alternate traits; (red+white=pink)
multiple alleles - 3 or more forms alleles that can determine four or more phenotypes
sickle cell anemia - a genetic disease caused by a codominant gene; hemoglobin is the wrong shape
linked genes - genes that are often inherited together because they are close to each other on the same
chromosome
Morgan, Thomas - scientist that studied the role of chromosomes in heredity and is noted for his
contribution in discovering linked genes
color blindness - A sex-linked recessive disorder that is carried on the X chromosome; an individual
cannot perceive certain colors.
hemophilia - a sex-linked recessive disease that is carried on the X chromosome; causing person to bleed
longer due to less of a clotting protein
sex linked genes - Genes located on the sex chromosomes.
X-linked recessive disorder - recessive disorder or disease caused by a defective gene on the x
chromosome; the most common type of sex-linked disorder
X- chromosome - where most sex-linked genes are located
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