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.

Biology & Microbiology

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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

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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%

Biology & Microbiology

Which of the following is NOT based on nucleic-acid hybridization?

A) DNA chip B) FISH C) PCR D) Southern blotting E) Western blotting

Biology & Microbiology

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.

Biology & Microbiology