The discovery of ____ allowed researchers to cut chromosomes into manageable-sized DNA fragments
a. single-nucleotide polymorphisms
b. restriction enzymes
c. DNA assembly enzymes
d. fragment length polymorphisms
e. receptor proteins
ANSWER: b
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Artemia, brine shrimp
(a) are aquatic organisms. (b) live in salty ecosystems. (c) are filter-feeding primary consumers. (d) are all of the above..
Answer the following statements true (T) or false (F)
1, In insects, as in humans, the presence of a Y chromosome determines maleness. 2, If you were to examine a typical population at a single locus, you would find more copies of the wild-type allele than any other allele. 3, An individual with an SRY gene is a male mammal. 4, Only fathers can pass on pattern baldness to their sons.
If a trait is X-linked recessive, who would express the trait?
A) females homozygous for the dominant allele and males hemizygous for the recessive allele B) heterozygous females and males hemizygous for the dominant allele C) females homozygous for the recessive allele and males hemizygous for the recessive allele D) females homozygous for the recessive allele and males hemizygous for the dominant allele E) the same proportions of females and males
A tabacco plant can be made to express a gene from fireflies, resulting in the emission of light. Which of the following is the basis for this phenomenon?
A. Chloroplasts can be made to produce light if firefly proteins are injected into plant cells B. Fireflies and tobacco plants share a recent common ancestor C. Fireflies and tabacco plants are infected by the same kinds of bacteria D. Transcription and translation are fundamentally similar in both fireflies and tobacco plants E. Most enzymes in fireflies have the same amino acid sequence as the enzymes in tabacco plants