Which statement about sickle cell anemia is false?
A) Individuals who are heterozygous for the sickle cell allele cannot make hemoglobin.
B) The sickle cell hemoglobin molecule contains an amino acid substitution.
C) The hemoglobin molecules of an individual with sickle cell anemia clump together.
D) The red blood cells of an individual with sickle cell anemia distort and elongate.
A) Individuals who are heterozygous for the sickle cell allele cannot make hemoglobin.
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Consisting of the fossilized remains of seedless vascular plant life, ____ was the first fuel to be widely used by human
societies.
a. gasoline b. petroleum c. natural gas d. crude oil e. coal
A "pseudogene" is best defined as:
a. a DNA sequence which is not itself expressed, but which has a functional homologous sequence in a related species. b. a DNA sequence that encodes a functional gene, but lacks a promoter region. c. a DNA sequence that arose from a duplication of a functional gene, but which itself is not expressed. d. a gene that is no longer expressed due to a point mutation. e. a coding sequence that was mutated due to chromosomal non-disjunction during meiosis.
The process by which microbes turn grape juice into wine is called___________________.
Fill in the blank(s) with the appropriate word(s).
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