Height (tallness) in humans is a polygenic trait. Assume the following: There are 4 genes that determine height (Aa, Bb, Cc, Dd). Each dominant allele adds 2 inches of height to an individual. The height of the recessive individual (aa, bb, cc, dd) is 5 feet. What is the height of a person with the genotype (AA, Bb, cc, DD)?

A. 5 feet, 4 inches
B. 5 feet, 10 inches
C. 5 feet, 8 inches
D. 6 feet, 6 inches
E. 5 feet, 6 inches


B. 5 feet, 10 inches

Biology & Microbiology

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Fibroblast cells are a good model system for studying muscle differentiation because

A. they are totipotent. B. they never differentiate into muscle cells in a normally developing animal. C. they can differentiate into muscle cells in a normally developing animal. D. they express a limited number of genes. E. they have a small genome.

Biology & Microbiology

If your mother is heterozygous for Huntington’s disease, which is caused by a dominant allele, the odds that you will

inherit the disorder from her are ____.

a. 1/4 b. 1/2 c. 3/4 d. 1 e. 0

Biology & Microbiology

Warm-up exercise 

A. increases blood flow to muscles. B. raises the temperature of muscles. C. increases heart rate. D. All of the above are correct.

Biology & Microbiology

The process of substances moving from the filtrate inside a kidney tubule into the peritubular capillaries is called ________________________.

A. glomerular filtration B. tubular reabsorption C. tubular secretion D. antidiuresis E. aldosterone processing

Biology & Microbiology