Genetics final lesson before exam
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Items in this lesson
Slide 1 - Slide
Slide 2 - Slide
Slide 3 - Slide
Slide 4 - Slide
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The grey symbols are people with a disease that is caused by a sex-linked gene. The red symbols are not sick. 7 and 8 are having a child, 11. 11 turns out to be a girl. What is the chance she has the disease?
The grey symbols are people with a disease that is caused by a sex-linked gene. The red symbols are not sick. 7 and 8 are having a child, 11. 11 turns out to be a girl. What is the chance she has the disease?
Slide 5 - Open question
In Drosophila (fruit flies) there is a recessive allele that causes veinless wings. This gene is located on the X-chromosome. A female with veinless wings is crossed with a male with normal wings. The F1 offspring that come from this cross and used to cross with each other to form the F2 generation. Which percentage of the F2 females will have veinless wings?
Slide 6 - Open question
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The disorder shown on the pedigree is Maple Syrup Urine Disease (MSUD) which is a metabolic disorder that affects the body’s ability to process certain proteins. It was named after a distinctive odor of a baby’s urine.
1. What is the inheritance pattern of this gene?
a) autosomal dominant b) autosomal recessive c) X-linked dominant d) X-linked recessive
2. Provide at least one piece of evidence for your claim.
1. What is the inheritance pattern of this gene?
a) autosomal dominant b) autosomal recessive c) X-linked dominant d) X-linked recessive
2. Provide at least one piece of evidence for your claim.
Slide 11 - Open question
The disorder shown on the pedigree is Maple Syrup Urine Disease (MSUD) which is a metabolic disorder that affects the body’s ability to process certain proteins.
1. What is the inheritance pattern of this gene?
a) autosomal dominant b) autosomal recessive c) X-linked dominant d) X-linked recessive
2. Provide at least one piece of evidence for your claim.
1. What is the inheritance pattern of this gene?
a) autosomal dominant b) autosomal recessive c) X-linked dominant d) X-linked recessive
2. Provide at least one piece of evidence for your claim.
Slide 12 - Open question
Charcot–Marie–Tooth disease (CMT)causes motor and sensory neuropathies of the peripheral nervous system.
1. What is the inheritance pattern shown?
2. Provide at least one piece of evidence for your claim.
3. The dashed line represents a possible union. Discuss the probability that such a union would result in a child with CMT.
1. What is the inheritance pattern shown?
2. Provide at least one piece of evidence for your claim.
3. The dashed line represents a possible union. Discuss the probability that such a union would result in a child with CMT.
Slide 13 - Open question
Cystic fibrosis is a disease that affects the ability of cells to move sodium across the cell membrane. This causes mucus to build up in the lungs resulting in respiratory problems.
1. What is the inheritance pattern shown?
2. Provide at least one piece of evidence for your claim.
1. What is the inheritance pattern shown?
2. Provide at least one piece of evidence for your claim.
