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Infectious agents that contain small circular pieces of RNA that are not packaged in a protein coat are known as:

True or False. The evolutionary history of modern wheat involved hybridization between a tetraploid ancestor with a diploid ancestor.

In mice, a cross between AYA+ heterozygotes produces two kids of progeny, yellow (AYA+) and gray-brown (A+A+), in a ratio of 2:1. Why is there an altered ratio of individuals produced?

Which of the following is true regarding recombination and evolution? 1. Recombination can bring/keep favorable mutations together 2. Chromosome rearrangements can suppress recombination 3. Chromosome rearrangements can be favored by natural selection

An organism that carries extra sets of chromosomes is termed:

By using the technique of labeling chromosomes with various DNA probes it is possible to: 1. Locate individual gene sequences on a chromosome 2. Compare the similarities between human DNA and another mammal’s DNA 3. Observe any abnormalities in the chromosome structure

Complementary strands of a DNA double helix have opposite chemical polarity but are synthesized in the same direction (replication fork movement). This is able to happen or in other words is accounted for by:

The fraction of genes that two individuals share due to common ancestry is known as:

Multiple crosses were made between true-breeding lines of black and yellow Labrador retrievers. All the F1 progeny were black. When these progenies were intercrossed, they produced an F2 generation consisting of 91 black, 39 yellow, and 30 chocolate (brown) dogs. How many gene products (dominant alleles) are required to produce black fur?

Summer squash color is determined by the interaction of more than one gene. The presence of CC or Cc allele combinations produces a squash that is white in color, and the C allele is epistatic to the G allele. The presence of GG or Gg produces a squash that is yellow in color and ccgg produces a squash that is green. After two heterozygous squash are crossed, one of the offspring is ccGg. What is the color of the offspring squash?