Would you recommend a couple in which the male is infertile to seek genetic counseling? Why or why not?
What will be an ideal response?
Background:
For some cases of male infertility, many couples now use a variation of IVF called intracytoplasmic sperm injection (ICSI). ICSI is used mostly in cases where low sperm count or motility problems are present. When ICSI is used in ART, there is an increased risk of transmitting genetic defects to male children. About 13% of infertile males with a low sperm count carry a small deletion on the Y chromosome. With ICSI, this form of infertility is passed on to their sons. The same is true for some chromosomal abnormalities, such as Klinefelter syndrome. Questions arise as to whether it is ethical to use ICSI to produce sons who will be infertile.
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You are interested in developing an inhibitor for the estrogen receptor. You have identified a molecule that is small and hydrophilic. In a test tube, this inhibitor binds tightly to the estrogen receptor, and inhibits the interaction of the receptor with estrogen. Do you think that this molecule will be an effective inhibitor of the estrogen receptor in cells?
A. Yes, because it can prevent estrogen binding. B. Yes, because it is small. C. No, because it is hydrophilic. D. No, because it will need to bind to the DNA-binding domain to act as an inhibitor.
What feature do the tree, ring, and web of life phylogenetic models share?
a. horizontal gene transfer between prokaryotes b. all species share a single common ancestor c. new species evolve from existing species d. speciation from the exchange of transposons
A forensic anthropologist, participating in a police investigation involving an unidentified corpse, announced that the body belonged to someone who had been left-handed. How was she able to decide this?
What will be an ideal response?
What is the metabolic abnormality that underlies the characteristic symptoms of diabetes mellitus, such as frequent urination?
A) a failure of the kidney tubules to reabsorb enough glucose from the urine B) a failure of the gastrointestinal epithelium to absorb enough glucose from food C) an inability of the body's cells to retain glucose they have absorbed from the blood D) an inability of the body's cells to absorb enough glucose from the blood