To learn the location of and determine the role that QTLs have on phenotypes, researchers look for associations between a marker locus genotype and phenotype. Examples of research focusing on such methods have been conducted on ________
A) human personality traits
B) human diseases such as Crohn's disease
C) the speed of thoroughbred race horses
D) All of the above.
D
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Eyelash length is an inherited trait. In the human population, there is an eyelash length gene. There are two possible variants of this gene - an allele for long eyelashes (> 1cm) and an allele for short eyelashes (1 cm or less). The allele for long eyelashes is dominant (L) and the allele for short eyelashes is recessive (l). An individual who is heterozygous for eyelash length would have which
of the following phenotypes? A. ll B. LL C. Ll D. Long eyelashes E. Short eyelashes
Global movements and circulation of air and ocean currents not only influence global climate, but also ____
a. aid in bird migration b. circulate pollutants c. decrease global warming d. decrease arctic sea levels e. dilute nuclear waste
The human X and Y chromosomes _____
A) are both present in every somatic cell of males and females B) are the same size and have the same number of genes C) include genes that determine an individual's sex D) are called autosomes
At the time life first appeared on earth, the atmosphere contained large amounts of nitrogen, methane, ammonia, hydrogen, hydrogen sulfide, and:
a) neon. b) oxygen. c) carbon dioxide. d) helium. e) ozone.