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

Biology & Microbiology

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An individual with Down syndrome has which type of chromosomal disorder?

a. Trisomy b. Monosomy c. Polyploidy d. Chromosome inversion

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology

Which kingdom of Eukarya consists primarily of unicellular organisms?

A) Plantae B) Bacteria C) Fungi D) Protista

Biology & Microbiology