The 9:6:1 ratio seen in the dihybrid cross of summer squash indicates what genetic relationship between the two genes controlling fruit shape?

A) recessive interaction
B) dominant interaction
C) recessive epistasis
D) dominant epistasis
E) dominant suppression


B

Biology & Microbiology

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Which one of the following interactions is not a stabilizing force at the tertiary level of protein organization?

A. an ionic bond between a positively charged side chain and a negatively charged side chain B. hydrophobic clustering of non-polar side chains in the interior of a protein C. hydrogen bonding between a carbonyl oxygen of one peptide bond and an amide hydrogen of a nearby peptide bond D. disulfide linkages between cysteine residues E. van der Waals interactions between side chains in close proximity

Biology & Microbiology

Which of the following statements is false?

a. Shark’s teeth are modified scales that are continuously shed and replaced. b. Many fish use a swim bladder to provide buoyancy control. c. The bony fishes were the ancestors of the cartilaginous fishes. d. The ray-finned fishes are the most numerous and diverse of the fish groups. e. The lobe-finned fishes are represented today only by the coelacanths.

Biology & Microbiology

Ways to Inhibit QS

What will be an ideal response?

Biology & Microbiology

How can a lipid be distinguished from a sugar?

a. a lipid is made up of only hydrocarbons. b. lipids are mostly nonpolar. c. lipids are mostly saturated. d. a lipid dissolves in water.

Biology & Microbiology