Hip dysplasia is a common ailment in large dog breeds including Rottweilers in the United
States. One breeder decides to import several females from Germany where the disease is less
common to mate with his male dogs. This introduction of new alleles into his dog population
is an example of __________.
a. natural selection
b. adaptation
c. gene flow
d. dispersal
C
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At the beginning of this century there was a general announcement regarding the sequencing of the human genome and the genomes of many other multicellular eukaryotes. Many people were surprised that the number of protein-coding sequences was much smaller
than they had expected. Which of the following could account for much of the DNA that is not coding for proteins? A) most of the DNA serving as origins of DNA replication B) DNA that consists of histone coding sequences C) DNA that is translated directly without being transcribed D) non-protein-coding DNA that is transcribed into several kinds of small RNAs with biological function E) non-protein-coding DNA that serves as binding sites for reverse transcriptase
The seriousness of Coccidioides infection can be attributed to the formation and rupture of spherules
Indicate whether the statement is true or false
A snapdragon plant has red, pink, or white flowers, inherited in an incomplete dominance pattern. It can come in tall or dwarf (homozygous recessive) varieties. What is the ratio expected if you cross a pink tall (heterozygous) plant with a pink short
plant? A) 2 red tall : 2 red short : 1 pink tall : 1 pink short : 1 white tall : 1 white short B) 2 red tall : 1 red short : 1 pink tall : 1 pink short : 2 white tall : 1 white short C) 3 red tall : 3 red short : 1 white tall : 1 white short D) 1 red tall : 1 red short : 2 pink tall : 2 pink short : 1 white tall : 1 white short E) 1 red tall : 1 red short : 1 pink tall : 1 pink short : 1 white tall : 1 white short
Vacuoles for ingesting food and regulating their water balance are characteristic of
A. sporozoans. B. spirochetes. C. trypanosomes. D. algae. E. ciliates.