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Wake-up1. A woman carrying hemophilia marries a
man who is a hemophiliac. What percentage of their children will have hemophilia?
2. Cross a man heterozygous B with a woman who is a purebred for A. What blood types will their children have?
Wake-up
1. How would you recognize an individual with Trisomy 16?
2. What would be the notation for a female with Trisomy 16?
3. Explain the difference between autosomes and sex chromosomes.
Albinism
Defect of melanin production that results in little or no color in the skin, hair, and eyes
How does it happen?
Affected Genotype:
aa
Cystic FibrosisDisease that causes the body to produce unusually thick, sticky mucus that:
• Clogs the lungs and leads to lung infections
• Obstructs the pancreas
• Stops natural enzymes from helping the body break down and absorb food
How does it happen?
Affected Genotype:
cc
Sickle Cell Anemia
Caused by an abnormal hemoglobin shape which causes the red blood cells to have a crescent shape.
Red blood cells carry oxygen.
Dominant Disorder
Caused by a dominant allele
Affected individuals are homozygous dominant or
heterozygous
Huntington’s Disease
Causes the break down of brain cells, (neurons) in certain areas of the brain.
Causes uncontrolled movements, loss of intellectual faculties, and emotional disturbance.
How does it happen?
Affected Genotype: HH or Hh
Wake-up1. A parent has a genotype Bb. What alleles
can this parent give their children?
2. A woman carrying colorblindness marries a normal male. What are the chances of producing a colorblind child?
3. How many alleles do you get from your parents (Dad and Mom)?
Types of Pedigrees: Recessive
Affected Genotypes: bb
Unaffected Genotypes: BB or Bb
HINT: Recessive Disorders skip generations
Types of Pedigrees: Sex-linked
Affected Genotypes: XbXb or XbY
Unaffected Genotypes: XBXB or XBXb and XBY
HINT: Mainly males are affected