Two alleles of gene C control hair color in horses: C¹ and C². Horses homozygous for allele C¹ are red, heterozygotes are yellow, and C² homozygotes are cream. In the offspring of matings between heterozygotes, what phenotypic ratio is expected?

A) 2 yellow: 1 red
B) 3 red: 1 cream
C) 1 red: 2 yellow: 1 cream
D) all red
E) 9 red: 3 yellow: 4 cream


C) 1 red: 2 yellow: 1 cream

Biology & Microbiology

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The ability to smell ____

a. manifests as a 1:1 relationship between an odor and a specific receptor b. specific chemicals can indicate a possible reaction to a chemically related drug c. specific chemicals will predict the effectiveness of antidepressants d. is mediated by a family of about 400 genes e. is mediated by the synthesis of olfactory receptors in the brain

Biology & Microbiology

The external morphological traits of two North American species of tree frog (Hyla versicolor and H. chrysoscelis) are

very similar; therefore, scientists use ____ to distinguish them.

a. internal anatomy b. behavioral traits c. homologous appendages d. skin coloration e. analogous structures

Biology & Microbiology

Refer to Table 8.2. If the sequence of amino acids encoded by a strand of DNA is serine-alanine-lysine-leucine, the coding for the antisense strand of DNA is

A) 5' ACAGTTTCAAT. B) 5' TCTGCAAAGTTA. C) 3' UGUGCAAAGUUA. D) 3' UCUCGAAAGUUA. E) 3' TCACGUUUCAAU.

Biology & Microbiology

What would be strong evidence to suggest a protist is phagotrophic?

A. Silicon dioxide cell walls B. Benthic lifestyle C. An abundance of lysosomes D. Locomotion using polar flagella E. Presence of chloroplasts

Biology & Microbiology