Summarize the events that occur during each stage of birth.
What will be an ideal response?
Stage 1 is when the uterine contractions of labor begin. The cervical canal slowly disappears as the uterus is pulled upward. The baby's head acts as a wedge to assist cervical dilation. The amniotic membrane will rupture during this stage.
Stage 2 is when the uterine contractions increase in frequency and force. The baby's head will descend into the vagina. As the head is delivered the rest of the baby will follow.
Stage 3 is when the placenta is delivered. Uterine muscular contractions shrink the size of the uterus and cause the placenta to be dislodged and expelled through the vagina.
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In DNA, the purines are ____
a. thymine and cytosine b. adenine and cytosine c. adenine and guanine d. thymine and adenine e. guanine and thymine
Huntington's disease is caused by the allele H, which is completely dominant to the normal recessive allele h. Consider a couple where the man has the genotype Hh, and the woman has the genotype hh
What is the chance that their first child will develop Huntington's disease? A) 0% B) 25% C) 50% D) 75%
Which of the following is NOT based on nucleic-acid hybridization?
A) DNA chip B) FISH C) PCR D) Southern blotting E) Western blotting
A recombinant plasmid created during a recombinant DNA experiment:
A) carries and allows expression of a foreign gene of interest. B) can be used to insert bacterial genes into a human. C) consists only of extra-chromosomal bacterial DNA. D) functions to remove specific genes from a plant. E) is used in whole organism cloning.