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25 Cards in this Set
- Front
- Back
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What type of inheritance pattern does this pedigree show (dominant or recessive, and autosomal or X-linked)? |
Dominant, autosomal |
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How did you know that answer (you need a reason for both parts dominant or recessive, and autosomal or X-linked)? |
Dominant: There are no carriers, there are affected individuals in every generation Autosomal: Equal number of males and females affected |
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What is the genotype of individual 3 (use the letter B)? |
bb |
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What type of inheritance pattern does this pedigree above show (dominant or recessive, and autosomal or X-linked)? |
Recessive, autosomal |
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How did you know that answer (you need a reason for both parts dominant or recessive, and autosomal or X-linked)? |
Recessive: There are carriers (although they are not marked that way on the pedigree), there are not affected individuals in every generation, unaffected parents can have affected children Autosomal: There are male carriers, close to equal number of males and females affected |
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What are the genotypes of the parents in generation I (use the letter B)? |
Bb x Bb |
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What type of inheritance pattern does this pedigree above show (dominant or recessive, and autosomal or X-linked)? |
Recessive, Sex-linked |
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How did you know that answer (you need a reason for both parts dominant or recessive, and autosomal or X-linked)? |
Recessive: There are carriers, there are not affected individuals in every generation, unaffected parents have affected children Sex-Linked: More males are affected than females, affected males inherit the trait from their mothers, no male carriers |
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Why would the daughter labeled 3A not be affected while her sister is? |
She inherited the dominant allele from her heterozygous mother, while her sister inherited the recessive allele. |
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If a male exhibits a sex-linked trait, who did he inherit it from? |
His mother |
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What are two examples of traits that are considered to be sex-linked? |
Hemophilia, colorblindness |
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Read the chart of genetic disorders. (Determine whether each disorder is dominant or recessive, and name the causes and symptoms.) |
Read Chart |
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How does sickle cell anemia relate to malaria? |
People who are heterozygous for sickle cell (carriers) have a high resistance to malaria. |
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How is sickle cell anemia inherited? |
It is a recessive trait (autosomal) |
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What is X inactivation and why does it occur? |
When one X chromosome in females quits functioning to balance out the unequal X chromosome in males. |
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Explain what causes the black and orange spots in calico cats: |
Orange patches are the result of the X chromosome that carries the black gene being inactivated while black patches are the result of the X chromosome that carries the orange gene being inactivated |
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How are the genes of Siamese cats influenced by their environment (explain it)? |
The gene that codes for production of color pigment in the Siamese cat’s body functions only under cooler conditions. Therefore the cooler areas of the cat’s body are darker; like ear tips, paws, and tail. |
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What antibodies are present in the plasma of a person with type A+ blood? |
B antibodies |
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What antibodies are present in the plasma of a person with type B- blood? |
A antibodies |
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What antigens are present on the red blood cells of a person with type AB blood? |
Both A and B antigens |
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What antigens are present on the red blood cells of a person with type O blood? |
None |
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What is the blood type of a blood sample of a person who had clumping with A antibodies, no clumping with B antibodies, and no clumping with Rh antibodies? |
A- |
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Could a man with type AB blood be the father of a child with type O blood? Why or why not, be specific? |
No because he does not have O alleles. |
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What are antigens? |
proteins on the surface of red blood cells |
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What would happen if a person with type O blood received blood from a person with Type A blood? |
There would be a clumping reaction between A antigens and A antibodies. |
