Suppose an Rh- mother gives birth to an Rh- baby. Is there a danger of hemolytic disease of the newborn developing during a subsequent pregnancy? Why or why not?
What will be an ideal response?
No. The Rh blood group is a major concern when the mother is Rh- and the fetus is Rh+. This incompatibility can result in a condition known as hemolytic disease of the newborn (HDN). If Rh+ blood from the fetus enters the Rh- maternal circulation (this often happens during the birth process), the
mother's immune system will produce antibodies against the Rh antigen. During a subsequent pregnancy with an Rh+ fetus, massive amounts of maternal antibodies against the Rh+ antigen cross the placenta in late stages of pregnancy and destroy the fetus's red blood cells, resulting in HDN. However, with an Rh- fetus, there is no Rh+ antigen present.
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It is believed that the surfaces upon which the first nucleic acids were able to form were made of:
A. limestone B. clay C. granite D. diamond E. sand
The ammocoete is the larva of
(a) lampreys. (b) sharks. (c) bony fishes. (d) amphibians.
Although a tropical fish aquarium is at best an approximation of a natural habitat, what constituents does the aquarium share with the natural habitat that are important to understanding the behavior of a particular species?
What will be an ideal response?
A diploid germ cell will produce cells that have reduced the chromosome number by half, generating four haploid nuclei in
a)fertilization. b)mitosis. c)meiosis. d)replication. e)mutation.