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

Biology & Microbiology

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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?

Biology & Microbiology

Write the sequence of the DNA strand complementary to a strand with the sequence AAATGCC

What will be an ideal response?

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology