In a human pedigree that traces the inheritance of sickle cell disease, a half-filled circle represents a
A) female with the disease.
B) heterozygous male.
C) heterozygous female.
D) individual who died.
C) heterozygous female.
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Restriction enzymes
a. produce staggered cuts in DNA that are often useful in splicing genes. b. are very specific in their action. c. are natural defense mechanisms in bacteria that destroy foreign DNA introduced by viruses. d. are used along with ligases and plasmids to produce DNA libraries. e. are all of these.
Four of the five answers listed below are components of a nucleotide. Select the exception
a. pentose sugar b. amino acid c. cytosine d. phosphate group e. adenine
Explain why sarcomere tension increases as the sarcomere length shortens from an extended length of 3.5 ?m to 2 ?m but then decreases if the sarcomere contracts to a length of 1.5 ?m
What will be an ideal response?
What is the function of the osmotic gradient found in the kidney? The osmotic gradient allows for _____
A) electrolytes to move from low to high concentrations in the absence of ATP B) the precise control of the retention of water and electrolytes C) the loop of Henle to deliver water to the renal vein D) the filtration of large cells at the glomerulus