The binomial nomenclature for humans is Homo sapiens. The term "Homo" refers to the
a. genus name.
b. species name.
c. scientific name.
d. trivial name.
e. ordinal name.
A
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You find a mutant Drosophila larva that is lacking anterior structures. You know that this embryo had normal amounts of Bicoid protein. What other type of mutation could cause this result?
A. A hunchback mutation that inhibits Hunchback production. B. A hunchback mutation that causes Hunchback overproduction. C. A maternal effect gene mutation that inhibits the production of a maternal gene product. D. A segmentation gene mutation that inhibits production of a segmentation gene product. E. A segmentation gene mutation that causes the overproduction of a segmentation gene product.
Crossing over occurs during ________ and is important because it ________
A) telophase II; creates daughter cells B) prophase I; generates variation C) anaphase II; separates the homologous pairs D) metaphase I; reduces the chromosome number by half
What feature of a dinosaur determines whether it is a saurischian or an ornithischian dinosaur?
a. size b. habitat c. feeding preference d. pelvic bone structure e. number of feet it walks on
Sickle-cell anemia results from a point mutation in the HBB gene. The mutation results in the replacement of an amino acid that has
(a) hydrophilic R-group with an amino acid that has a hydrophobic R-group on the exterior of the hemoglobin protein. Such a mutation would most likely result in altered (A) properties of the molecule as a result of abnormal interactions between adjacent hemoglobin molecules (B) DNA structure as a result of abnormal hydrogen bonding between nitrogenous bases (C) fatty acid structure as a result of changes in ionic interactions between adjacent fatty acid chains (D) protein secondary structure as a result of abnormal hydrophobic interactions between R-groups in the backbone of the protein