The 9:3:3:1 ratio is typical of a dihybrid cross in which complete dominance and independent assortment occur. What is the dihybrid ratio with independent assortment of polygenes?
What will be an ideal response?
1:4:6:4:1
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What is a main function of the structure in the accompanying figure labeled "B"?
a. It controls cell shape. b. It separates DNA during cell division. c. It helps nerve cells lengthen. d. It is found in hair. e. It helps regulate DNA replication.
Differentiation is the process in which cells _____________.
A. mature into larger cells B. change from one type of muscle to another C. change to repair injuries D. turn on all the genomic genes E. express different subsets of their genes during development
A diet high in animal products and hydrogenated vegetable margarine may increase the risk for heart disease. This is because
A) most animal fats are unsaturated and most hydrogenated vegetable margarines contain high levels of steroids. B) most hydrogenated vegetable margarines are hydrogenated oils and most animal products contain high levels of phospholipids. C) most animal fats are used for energy storage and most hydrogenated vegetable margarines contain high levels of unsaturated fats. D) most animal fats are saturated and many hydrogenated vegetable margarines contain high levels of trans fats.
What were the two different types of australopithecines?
A. erect, knuckle-walker B. hunting, gathering C. gracile, robust D. arboreal, terrestrial E. carnivorous, omnivorous