Mastering Biology 11

24 July 2022
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question
Which of the following is LEAST likely to be a health problem for someone with cystic fibrosis?
answer
obesity
question
The allele that causes cystic fibrosis is recessive. An individual who is heterozygous for cystic fibrosis
answer
is a carrier.
question
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?
answer
0%, because the child must receive the bad gene from both parents
question
Part D If Sophie has a brother or sister from the same parents, what are the chances that sibling would have cystic fibrosis?
answer
25%
question
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.
answer
one copy; does not
question
Which of the following do you think contributed the most to the success of Rhys' gene therapy?
answer
Doctors were replacing only one gene, and they only had to insert that gene into bone marrow cells.
question
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?
answer
diabetes, since the target cells are found only in the pancreas
question
How could an embryonic stem cell be used to repair a severed spine?
answer
Embryonic stem cells can grow into any other cell type, including a nerve cell.
question
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?
answer
Cord blood contains stem cells that can be grown and differentiated into some cell types but not all cell types.
question
A __________ cuts DNA only at specific nucleotide sequences.
answer
restriction enzyme