Given that an individual is a compound heterozygote at the CFTR locus, the gene that causes cystic fibrosis, what can be inferred?
A) If the individual has children, all the children will have cystic fibrosis.
B) At least one of the individual's parents had cystic fibrosis.
C) The individual is a carrier for cystic fibrosis, but does not have the disease.
D) A drug that effectively treats one allele may not treat the other.
D) A drug that effectively treats one allele may not treat the other.
You might also like to view...
From an evolutionary standpoint, which of the following organisms would be the most fit?
a. a tree that produces thousands of seeds, of which three grow to sexual maturity b. a bird that produces offspring, of which three survive to reproduce c. an elephant that has a single offspring that nurses for 8 months and reaches sexual maturity in 10 years d. both (a) and (b)
The presence of DNA is not one of the major characteristics of life. Why, then, might scientists look for the presence of DNA to help confirm the existence of life?
What will be an ideal response?
Which of the following is true of movement
through the phloem?
a. movement through phloem is through live cells b. movement between sieve tube members is via plasmodesmata c. movement through the phloem is not necessarily up d. the phloem cells through which movement occurs are non-nuclear e. all of these are true about movement through the phloem
What refers to the situation in which the binding of a substrate to the enzyme causes a change in the
enzyme's shape, facilitating an enzyme's function? a. active site b. cofactor c. activation energy d. induced fit e. allosteric inhibition