Before Direct Proof of DNA Being the Genetic Material,indirect Evidence

question 40

Multiple Choice

Before direct proof of DNA being the genetic material,indirect evidence suggesting DNA as the appropriate macromolecule,included

• A) Gametes have 1/2 the amount of DNA as somatic cells
• B) Molecular composition of DNA is the same in different cells of an organism, whereas RNA and protein contents vary
• C) A correlation between DNA content and the number of chromosome sets per cell
• D) DNA is more stable than RNA or protein
• E) All of these

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Definitions:

Ova

The female reproductive cells or eggs in animals and plants.

Tetrads

Structures formed during meiosis consisting of four chromatids (two homologous chromosomes) that enable genetic recombination and reductional division.

Metaphase I

A stage in the first division of meiosis where homologous chromosomes align at the equatorial plate before being separated into two daughter cells.

Sister Chromatids

Identical copies of a chromosome, connected by a centromere, that are present in a cell after DNA replication.