What form does the DNA of a cell have during interphase?
A. homologous chromosomes paired together
B. X-shaped sister chromatids that haven't replicated
C. loosely wrapped around proteins forming chromatin
D. tightly coiled around proteins to form single chromosomes
Ans: C. loosely wrapped around proteins forming chromatin
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An individual with Down syndrome has which type of chromosomal disorder?
a. Trisomy b. Monosomy c. Polyploidy d. Chromosome inversion
Three loci, mitochondrial malate dehydrogenase that forms a and b (MDHa, MDHb), glucouronidase that forms 1 and 2 (GUS1, GUS2), and a histone gene that forms + and - (H+, H-) are located on chromosome 7 in humans
Assume that the MDH locus is at position 35, GUS at position 45, and H at position 75. A female whose mother was homozygous for MDHa, GUS2, and H+ and whose father was homozygous for MDHb, GUS1, and H- produces a sample of 1000 egg cells. Give the genotypes and expected numbers of the various types of cells she would produce. Assume no chromosomal interference.
The science of comparative genomics to study human gene function is possible because much of the human genome is
conserved among other closely related species. Indicate whether the statement is true or false.
Which kingdom of Eukarya consists primarily of unicellular organisms?
A) Plantae B) Bacteria C) Fungi D) Protista