Multiple Choice
Which statement supports the proposition that the presence of an X chromosome appears to be necessary for life?
A) X-chromosomal genotypes are expressed as consistent phenotypes at a rate of around 85%, while Y-chromosomal genotypes are expressed as consistent phenotypes at a rate of only about 15%.
B) The X chromosomes are expressed far earlier in the prenatal period than the Y chromosomes.
C) There are no chromosomal disorders wherein a person has only Y chromosomes.
D) Most of the lethal chromosomal disorders, including Tay-Sachs disease and cystic fibrosis, are located on the Y chromosome.
Correct Answer:
Verified
Correct Answer:
Verified
Q63: Your authors point out that teenage women
Q64: Postpartum depression<br>A) occurs in about 50 percent
Q65: When you learned to read English, you
Q66: Randi is pregnant for the first time.
Q67: List three prenatal tests that might be
Q69: Although identical twins share 100% of their
Q70: Which of the following circumstances would indicate
Q71: A standard part of prenatal care in
Q72: Why is it that environmental teratogens may
Q73: When a woman experiences higher levels of