A person with sickle-cell trait has ________ at the ?-globin locus
A) two wild-type alleles
B) two mutant alleles
C) one wild-type and one mutant allele
D) one wild-type and one deleted allele
E) one mutant and one deleted allele
C
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Which of the following is true regarding bacterial genetics?
A. Bacteria are usually diploid organisms B. Bacteria primarily reproduce sexually C. The patterns of inheritance in bacteria are studied using different mechanisms than eukaryotes D. Bacteria generally have linear chromosomes
Schizophrenia and bipolar disorder are caused by _____
a. one gene, plus environmental triggers b. the same gene c. many genes, plus environmental triggers d. copy number variants, without environmental triggers e. the same mutations that cause autism spectrum disorders
When Ellison and Gotelli manipulated concentrations of nutrients available to pitcher plants, what was the independent variable?
A. number of insects fed to each plant
B. ratio of the pitcher opening to pitcher length
C. ratio of the keel width to total width
D. amount of nitrogen or phosphorus added to the pitcher of each plant
E. amount of nitrogen or phosphorus added to the roots of each plant
At which point or stage would the majority of cells in the embryo no longer be stem cells?
A) the pre-embryo stage B) in the blastocyst C) after the organs start to develop D) A large number of stem cells would exist in all these stages.