The karyotype of a young patient shows two Barr bodies per cell. What condition might this child have?
A. Turner syndrome
B. Triple X syndrome
C. Down syndrome
D. Klinefelter syndrome
E. This child is a normal female.
B. Triple X syndrome
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Which of the following is true of composite transposons of bacteria?
A. They are composed of two inverted repeats (IR) flanking a transposase gene. B. They are composed of two inverted repeats flanking a number of genes for auxiliary proteins that activate or assist transposition. C. They usually consist of two insertion elements flanking some additional genes. These genes are frequently antibiotic-resistance genes. D. They replicate via an mRNA intermediate. E. They only use the inner IR elements when transposing.
Contrast animal relationships based on molecular data versus based on morphological and
developmental data.
What will be an ideal response?A nonprofit conservation organization receives a sizeable donation and decides to purchase several thousand acres of "high desert" in southern California. This particular type of desert has an intermediate level of species diversity and few unique species. However, much of the original areas of high desert have been converted to suburban housing and shopping. The decision by the nonprofit to preserve this area was most likely based upon what conservation strategy?
A. Conservation of endemic species hotspots B. Conservation of megadiverse areas C. Conservation of representative habitats D. Conservation of single species
Replication of the DNA occurs during
A) metaphase. B) prophase. C) telophase. D) anaphase. E) interphase.