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Embed code for: 14 finish - genetic disorders
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Chapter 14 finish
Autosomal vs sex-linked
Autosomal disorders are located on autosomal chromosomes (pairs #1-22) and affect males and females equally
Examples: Albinism, Cystic fibrosis, sickle cell disease, neurofibromitosis
Sex-linked disorders are located on the X chromosome only and tend to affect males more often than females (WHY?? - demo)
Red-green colorblindness, Hemophilia A
Carrier – describes somebody who has a heterozygous genotype. They are not affected by the disease, but could pass on trait to offspring
Sex-linked disorders are located on the X chromosome and tend to affect males more often than females (WHY?? - demo)
XA is dominant over Xa
Y does not carry an allele, so only one recessive allele (Xa) is needed to express recessive traits for males
Demo (why do sex-linked traits affect males more often)?
2 cups, each represents all allele possibilities with beans
Red: XA (normal vision)
Black: Xa (colorblindness)
White: Y (male)
What if we crossed a mother who was a carrier (normal) with a father who was normal?
Autosomal recessive example (front page)
Autosomal dominant example (front page)
Sex-linked Example (back side first page)
Sex-linked Pedigree example (last page)