Childbirth consists of (select all correct choices):
A. oxytocin release.
B. descent and delivery of the baby.
C. delivery of the placenta.
D. widening of the cervix.
E. lengthening of the cervix.
A,B,C,D
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The fact that the average human birthweight remains at about seven pounds is due to
a. modern prenatal care. b. the forces of stabilizing selection. c. conscious effort on the part of mothers. d. the limitations of food sources. e. selection tendencies moving in the direction of increasing birthweight.
You have just graduated from college as a business major, but have a special interest in genetics, ever since taking introductory biology with the new Life curriculum. Therefore, you decide to manage a pet store where you can dabble in animal breeding experiments. Your first investigation is with one of your childhood favorites, the guinea pig. When you cross a black guinea pig with a white
guinea pig, three of the offspring are black and three are white. When you cross two of the black offspring you get six black and two white offspring. Which phenotype is most likely dominant? How do you know? What are the genotypes of the original parental guinea pigs? What will be an ideal response?
When a muscle fiber is relaxed, why can’t
myosin bind to actin?
a. ATP is not present b. the myosin binding site on actin is blocked c. the myosin head is in the wrong shape for binding d. the actin is in the wrong orientation for myosin binding e. the myosin head is 180 degrees from its attachment configuration
Which of the following is common to both Sanger sequencing and next-generation sequencing?
A) radioactive labels B) gel electrophoresis C) tethered DNA fragments D) chain terminating nucleotides E) lasers