Assume that investigators crossed a strain of flies carrying the dominant eye mutation Lobe on the second chromosome with a strain homozygous for the second chromosome recessive mutations smooth abdomen and straw body
The F1 Lobe females were then backcrossed with homozygous smooth abdomen, straw-body males, and the following phenotypes were observed:
smooth abdomen, straw body 820
Lobe 780
smooth abdomen, Lobe 42
straw body 58
smooth abdomen 148
Lobe, straw body 152
(a) Give the gene order and map units for these three loci.
(b) What is the coefficient of coincidence?
(a) Lobe is in the middle.
smooth abdomen---5---Lobe-----------15-------------straw body
(b) zero
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A kidney dialysis machine
a. may cleanse the patient's blood outside the body. b. may use the patient's abdominal cavity as the site for solute exchange. c. may use hemodialysis. d. may use peritoneal dialysis. e. may do all of these
Which of the following are the primary structures
that package cellular secretions for export from the cell? a. Golgi bodies b. ribosomes c. mitochondria d. lysosomes e. endoplasmic reticula
Scientists use various terms to describe conclusions reached through the scientific method. Which of the following terms conveys the least degree of certainty?
A) theory B) hypothesis C) law D) both hypothesis and theory E) both theory and law