The Figure Below Depicts Changes to the Amount of DNA

question 83

Multiple Choice

The figure below depicts changes to the amount of DNA present in a recipient cell that is engaged in conjugation with an Hfr cell. Hfr cell DNA begins entering the recipient cell at Time A. Assume that reciprocal crossing over occurs (in other words, a fragment of the recipient's chromosome is exchanged for a homologous fragment from the Hfr cell's DNA) . Use this figure to answer the following questions.

-Which question, arising from the results depicted in the above figure, is most interesting from a genetic perspective, and has the greatest potential to increase our knowledge base?

• A)If reciprocal crossing over could occur even if the piece of donated Hfr DNA were identical to the homologous portion of the recipient's chromosome, what prevents this from occurring?
• B)What forces are generally responsible for disrupting the sex pilus?
• C)How is it that a recipient cell does not necessarily become an Hfr cell as the result of conjugation with an Hfr cell?
• D)What makes a cell an Hfr cell?

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Definitions:

Population Variance

A measure used in statistics to describe the dispersion or spread of a set of data points in a population, indicating how much the individuals differ from the mean.

Heritability

A measure of how much of the variation in a trait within a population can be attributed to genetic differences among individuals.

Genetically Determined

An attribute or condition that is established by an individual's genetic makeup, influencing their characteristics or predispositions.

Socioeconomic Status (SES)

is an aggregate concept that includes income, educational attainment, and occupational prestige, influencing access to resources and opportunities.