A disorder caused by nondisjunction of chromosome 21, resulting in a trisomy 21 child, is
A) Down syndrome. B) hemophilia. C) cystic fibrosis. D) color deficiency.
A
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In sweet peas, dominant alleles C and P are necessary for colored flowers. In the absence of either (__ pp or cc __) or
both (cc pp), the flowers are white. What will be the color of the offspring of the crosses listed below and in what proportions? (a) Cc Pp x cc pp (b) Cc Pp x Cc Pp (c) Cc PP x Cc pp (d) Cc pp x cc Pp What will be an ideal response?
Blood pressure is ____
a. normal at 140/90 mm Hg b. greater in the veins than arteries c. the fluid pressure exerted on a vessel wall d. considered hypertensive at 110/70 mm Hg e. generated by the contraction of the atria
Hormones regulate reabsorption in which region of the kidney tubule system?
A) Proximal tubule B) Glomerular capsule C) Distal tubule D) Glomerulus E) Nephron loop
Write the sequence of the DNA strand complementary to a strand with the sequence AAATGCC
What will be an ideal response?