Mastering Biology 11 – Flashcards
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Which of the following is LEAST likely to be a health problem for someone with cystic fibrosis?
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obesity
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The allele that causes cystic fibrosis is recessive. An individual who is heterozygous for cystic fibrosis
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is a carrier.
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If Sophie conceives a child, and the father neither has cystic fibrosis nor is a carrier, what are the chances that the child would have cystic fibrosis?
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0%, because the child must receive the bad gene from both parents
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Part D
If Sophie has a brother or sister from the same parents, what are the chances that sibling would have cystic fibrosis?
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25%
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If someone is a carrier of a recessive genetic disorder, it means he or she has __________ of the allele, and __________ exhibit symptoms of the disorder.
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one copy; does not
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Which of the following do you think contributed the most to the success of Rhys' gene therapy?
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Doctors were replacing only one gene, and they only had to insert that gene into bone marrow cells.
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Theoretically, which of the following diseases should be the easiest to treat through gene therapy, considering the targeted organs and tissues where the corrected gene must be delivered?
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diabetes, since the target cells are found only in the pancreas
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How could an embryonic stem cell be used to repair a severed spine?
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Embryonic stem cells can grow into any other cell type, including a nerve cell.
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Certain cells taken from umbilical cord blood have the potential to treat illnesses such as lymphoma and leukemia. In what way are cord blood cells useful to treat these diseases?
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Cord blood contains stem cells that can be grown and differentiated into some cell types but not all cell types.
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A __________ cuts DNA only at specific nucleotide sequences.
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restriction enzyme
