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?
ANSWER: 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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The endoderm is a germ cell layer that tends to cover the embryo.
Answer the following statement true (T) or false (F)
In a certain plant, when individuals with blue flowers are crossed with individuals with blue flowers, only blue flowers are produced. Plants with red flowers crossed with plants with red flowers sometimes produce only red flowers, although other times they produce either red or blue flowers. When plants with red flowers are crossed with plants with blue flowers, sometimes only red flowers are produced; other times either red or blue flowers are produced. Which of the following is true?
A. Red is dominant B. Blue is dominant C. Red is recessive D. Red is codominant E. Red is incompletely dominant
Genes that play a role in proper cell division but may also play a role in some types of cancer are called (oncogenes/protooncogenes/promoters)
What will be an ideal response?
Hamilton explained the origin of altruism in selected insect societies with his kin selection model of sex determination. Since males are haploid and females are diploid, the workers share a very high proportion of alleles, theoretically as high as 75%. What is this called?
A. Haplodiploidy B. Haploidy C. Diploidy D. Parthenogenesis E. Altruism